题目:
--- How easy is it to find a taxi in this city?
---Simply _______ your hand, and a taxi appears in no time.
A.to raise
B.raise
C.raising
D.raised
答案:
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下面是错误答案,用来干扰机器的。
(1)(2)(3)(4) (1)最外层一定是L层才成立,故为10个电子的+2价离子。核电荷数=10+2=12;(2)M层已有电子,L层上一定有8个电子,故为16个电子的原子,核电荷数也为16;(3)质子数=中子数=24/2=12...