5,7,(),13,17,19,23,29。
A.12
B.9
C.11
D.10
参考答案:C
解析:
这是一组质数数列,质数即是只能被1和本身整除的数,故未知项为11,故选C。
—I think it is ______ great pleasure to work with you.
—Me too. What’s more, what we’re doing will make ____ big difference to the lives of poor families.
A.a; a
B.a; 不填
C.不填; the
D.the; an
根据桩的导纳曲线,可计算桩的()
A、测量长度
B、平均桩径
C、动刚度kD
D、任意点的波速