第1题：
According to the passage, it is true that ________.
[A] in the late 19th century in the United States the dividing line between adolescence and adulthood no longer existed
[B] no one can marry without the permission of his parents until the age of twenty-one
[C] one is considered to have reached adulthood when he has a driver’s license
[D] one is not free from the restrictions of child labor laws until he can join the arm
第2题：
Magnetic dip is a measurement of the angle between the ______.
A.geographic pole and the magnetic pole
B.lubber’s line and true north
C.horizontal and the magnetic line of force
D.compass heading and the magnetic heading
第3题：
"Vulnerable to" in Line 3 probably means ______.
A．subject to
B．easy to be attacked by
C．of great volume
D．likely to damage
第4题：
What's the（）difference between the two parties?
第5题：
第6题：
What is the major advantage of a rhumb line track?
A.The vessel can steam on a constant heading (disregarding wind，current，etc)
B.The rhumb line is the shortest distance between the arrival and departure points
C.It is easily plotted on a gnomonic chart for comparison with a great circle course
D.It approximates a great circle on east-west courses in high latitudes
第7题：
第8题：
A.in which
B.that
C.which
D.where
第9题：
The Interior Plains lie between（）and（）
Athe Canadian Shield/the Appalachian Region
Bthe Canadian Shield/the Rocky Mountains
Cthe Great Lakes/the Arctic Islands
Dthe Appalachian Region/the Great Lakes
第10题：
（）stands as a great dividing line between the nineteenth century and the contemporary American literature.