单选题Sometimes it is necessary to be careful _____ the right date to sit for a test.A when choosingB when you will chooseC when you have chosenD when you chose

题目

单选题

Sometimes it is necessary to be careful _____ the right date to sit for a test.

when choosing

when you will choose

when you have chosen

when you chose

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相似问题和答案

第1题：

You can't be too careful to finish your homework.

A.Wrong.

B.Right.

参考答案：B

第2题：

We place the first order on the clear understanding that the goods are dispatched in time to reach here by August 30, and reserve the right to cancel it after this date.(英译中)

参考答案：我们明确该首批订货将在8月30日前及时运抵此地。如果交货迟于此日期，我们保留取消定单的权利。

第3题：

Responsibility is the right to make decisions that are necessary for the accomplishment of certain tasks.()

此题为判断题(对，错)。

正确答案:×

第4题：

—It’s very ________ of you to work out the problem for me. 学科网 —That’s all right.

—It’s very ________ of you to work out the problem for me.

—That’s all right.

A. kind B. clever C. necessary

正确答案：A

第5题：

设系统日期为2001 年 12月 31 日，下列表达式的值是【】。 VAL(SUBSTR("1999",3)+RIGHT(STR(YEAR(DATE()))，2))+17

正确答案：9918.00 或 9918
DATE()：返回当前系统日期YEAR()；从指定的日期表达式或日期时间表达式中返回年份STR(数值表达式＞)[，长度＞[，小数位数＞]])：将数值表达式＞的值转换成字符串，转换时根据需要自动进行四舍五入。RIGHT(字符表达式＞，长度＞)：从指定表达式值的右端取一个指定长度的子串作为函数值。SUBSTR(字符表达式＞，起始位置＞[，长度＞])从指定表达式的指定起始位置取指定长度的子串作为函数值。VAL(字符表达式＞[，长度＞[，小数位数＞]])：将数字符号(包括正负号、小数点)组成的字符型数据转换成相应的数值型数据。题面VAL(SUBSTR("1999",3)+RIGHT(STR(YEAR(DATE()))，2)+17=VAL(99+RIGHT(STR("2001")，2))+17=VAL("99"+"01")+17=9901+17=9918。

第6题：

It is necessary that measures _____ taken right now.

A: be

B: must be

C: will be

D: can be

参考答案：A

第7题：

If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to_______the engine

A.stop

B.start

C.speed up

D.slow down

正确答案：A

第8题：

Though we know it isn’t right, we sometimes tend to ________ people by their appearance.

A.see

B.look

C.know

D.judge

参考答案：D

第9题：

假定系统日期是1998年12月20日，有如下命令： SET DATE T0 MDY NJ=DTOC(DATE()) ?RIGHT(NJ,2) 执行该命令后，NJ的值是( )。

A．1998

B．98

C．981220

D．1220

正确答案：B

第10题：

Where a charter-party specifies the estimated time of arrival of a vessel at the port of loading， there is ________ on the shipowners to sail to there on the date on which when proceeding with all convenient speed it would normally reach the port on or about the estimated date of arrival．

A.a necessary right

B.an absolute observation

C.an absolute obligation

D.a possible solution

正确答案：C

Sometimes it is necessary to be careful _____ the right date

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