皂土吸水率≥（）。 A.200% B.400% C.150%

—Jane got an "A" in the Maths test.

—_________. She works the hardest in our class. [ ]

A. Many hands make light work

B. The grass is always greener than the other side

C. Early birds catch the worm

D. Don't put all your eggs in one basket

如果能够发现别人的优点，两个人的关系就会走向庆祝。

圆柱齿轮副啮合不良的修复方法有哪些？

对照试验是用已知结果的试样与（）一起进行的分析试验。

正常成人的头围应该在（）cm。

A.40-52

B.56-60

C.53-56

D.60-65