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父母素质强壮,其子女体质也一定强壮吗?为什么?

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We will go to visit the museum this afternoon and I want you here by two oclock without

A. fail
B. failure
C. trouble
D. hesitation

Some people______garden insects by spraying poison on the plants.

A. erase
B. exterminate
C. exclude
D. extinguish

【C9】

A. and
B. with
C. but
D. among

截面面积相同,长度相同,在轴向压力的作用下,最先发生失稳破坏的是()
A两端为铰支的杆件,
B一端为铰支,一端固定的杆件,
C两端为固定的杆件,
D一端固定的杆件,一端自由的杆件

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