（2分）小刚和小明分别用沿斜面向上的力F甲、F乙把同一重物匀速拉到两个斜面的顶端
题型：选择题
问题：
（2分）小刚和小明分别用沿斜面向上的力F甲、F乙把同一重物匀速拉到两个斜面的顶端，若两个斜面光滑、等高，甲斜面长4m，乙斜面长5m，所做的功跟别是W甲、W乙，则下列说法正确的是（ ）
A．使用甲斜面比使用乙斜面要省功
B．甲斜面的机械效率比乙斜面的机械效率高
C．拉力F甲与F乙之比为5：4
D．两个拉力做功W甲与W乙之比为4：5
题型：选择题
完成句子（共10小题，每小题1分，满分10分）
1．The zoo ________(吸引) many visitors every day, especially children.
2．Have they __________(宣布) when the race will begin?
3．He was a__________ in the book and didn’t hear the bell at all.
4．You must pay for the book______ ________(提前).
5．The world is __________ ___________（分成）seven continents.
6．You can ________ ________(遗漏) the parts of the story that are not interesting.
7．I learn that the medical team_________
__________(由……组成) ten doctors 
and twenty nurses.
8. John Snow proved that the water _____ _____ _____ (应负责任) for cholera.
9．The teacher _________(invite) to the concert arrived on time.
10．John received an invitation to dinner, and with his work _________(finish), he gladly accepted it.