青岛流亭机场跑道为17/35,青岛东南两面濒临黄海,如果只考虑海陆差异形成的风,则白天使用()跑道更有利于起降。
A. 17
B. 35
C. 二者一样
D. 不确定
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程序填空题:补充完善如下代码,使得程序能够计算 a 中各元素与 b 逐项乘积的累加和。提示代码如下:a = [[1,2,3], [4,5,6], [7,8,9]]b = [3,6,9]____①____for c in a:for j in ____②____:s += c[j]*b[j]print(s)
In most cases, lung cancer is _________ to cigarette smoking.
A. related
B. contacted
C. joined
D. united
Itruly believe we must speak out and _________ our voice heard at this very moment.
A. do
B. make
C. declare
D. repeat
One morning the teacher allowed __________.
A. him to go
B. he goes
C. him go
D. him going