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多选题If n = 6 × 15, which of the following are prime factors of n? (Indicate all of the answer choices that apply.)A2B3C7D9E15

题目
多选题
If n = 6 × 15, which of the following are prime factors of n? (Indicate all of the answer choices that apply.)
A

2

B

3

C

7

D

9

E

15

参考答案和解析
正确答案： C,A
解析：
因为n = 6×15=2×3×3×5，所以n的质因数为2, 3, 5，所以本题选AB。
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相似问题和答案

第1题：

Which one of the following answer choices below is true regarding the OSPF topology database?（）

  • A、All entries in the topology database will be included on each router.
  • B、All routers in the same OSPF area will have one topology database.
  • C、The Dijkstra algorithm is used in the creation of the topology database.
  • D、LSA packets are used to update and maintain the topology database.

正确答案:D

第2题：

多选题
The ratio of two quantities is 4 to 5. If each of the quantities is increased by 3, which of the following could be the ratio of these two new quantities? (Indicate all answer choices that apply.)
A

7/8

B

11/13

C

23/28


正确答案： C,B
解析：
由于题目中两个数字的具体数值不确定，因此任何符合题干条件的数值都可以，经验算，选项A, B, C均符合题意。

第3题：

Which of the following correctly describe the various functions and virtues of a router? (Select all valid answer choices)

A. Packet switching

B. Collision prevention on a LAN segment.

C. Packet filtering

D. Broadcast domain enlargement

E. Broadcast forwarding

F. Internetwork communication

G. None of the above


正确答案：ACF
A,C,F 解析：Explanation:
The main function of a router is to connect different, separated networks together. In doing so, switching packets from one network to another is a primary function, along with providing for communication between networks. As an additional feature, routers are capable of providing filtering on a network address and application port level, so choice C is also correct.

Incorrect Answers:
B. Routers can indeed be used to segment a network separate a collision domain, since routers do not forward LAN broadcasts and multicasts to other interfaces. However, routers alone can not prevent all collisions from occurring on any given LAN segment.

D. Routers actually segment LANs into smaller broadcast domains.

E. Routers do not forward broadcast and multicast traffic out the additional interfaces by default. Unless bridging or IP helpers are configured on the router, LAN broadcasts are blocked at the router level.

第4题：

多选题
Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
A

c=d

B

l and k are parallel

C

m and l are perpendicular


正确答案： C,B
解析：
根据题目中的已知信息无法推断出各直线的关系，因此B、C均不正确；而由图示可知，c和d分别是a和b的补角，由于a=b，所以c=d，A项正确。

第5题：

多选题
Triangle PQR is isosceles and ∠PQR measures 50°. Which of the following could be the measure of ∠PRQ? (Indicate all of the answer choices that apply.)
A

60°

B

65°

C

80°

D

100°

E

130°


正确答案： D,E
解析：
因为⊿PQR为等腰三角形，所以当∠PQR为顶角时，∠PRQ=65°；当∠PQR为底角时，∠PRQ=80°，故本题选择BC。

第6题：

多选题
Which of the following are troubleshooting targets common to both site-to-site and remote-accessVPNs？（Choose all that apply.）（）
A

Routing loops

B

Misconfiguration of VPN end points

C

Overiapping IP address space

D

DMVPN

E

User profiles

F

MTU


正确答案： E,C
解析： 暂无解析

第7题：

多选题
If 4 more than twice n is a negative number and 6 more than n is a positive number, which of the following numbers could be the value of n? (Select all such numbers.)
A

-5

B

4

C

-3


正确答案： B,A
解析：
根据题目中的已知条件可得，4+2n<0，6+n>0，把各个选项分别代入两个不等式中检验，同时符合两个不等式可得到n可以等于-5，-4，-3，故正确答案为AC。

第8题：

Which one of the following answer choices below is true regarding the OSPF topology database?()

A. All entries in the topology database will be included on each router.

B. All routers in the same OSPF area will have one topology database.

C. The Dijkstra algorithm is used in the creation of the topology database.

D. LSA packets are used to update and maintain the topology database.


参考答案：D

第9题：

多选题
For this question, indicate all of the answer choices that apply. If 0
A

x < 1/x

B

-x < x

C

x2 < x3

D

x2 < x

E

x < x+2


正确答案： A,B,D,E
解析：
取x=1/2，代入验证可知ABDE四项是正确的。

第10题：

多选题
For Question 2, consider each of the choices separately and select all that apply.　 The passage supports which of the following statements about Rembrandt?
A

Most of Rembrandt’s contemporaries avoided the use of humble models for their paintings

B

Rembrandt achieved enhanced artistic effect through the use f a unique method.

C

Rembrandt saw artistic value in subject matter outside the mainstream.


正确答案： B,A
解析：
三个选项在文中均有所体现。有文段第一句可知，与Rembrandt同时代的画家更注重对神的描绘，A项正确；倒数第二句提到，Rembrandt 使用chiaroscuro（明暗对照法）画画，从而“fittingly enhanced his work”，B项正确；选项C可以从文中推断出来，Rembrandt选择与同代画家不同的绘画主题，是因为他在自己所画的人物身上看到了他们的艺术价值，文段第三句有所体现。

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