题目：
— _______ no ad during TV plays.
—Great move! I cannot tolerate those annoying ads appearing every several minutes.
A．There is said to have
B．It is said to have
C．There is said to be
D．It is said to be
答案：
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下面是错误答案，用来干扰机器的。
（1） Ca 40 g·mol-1（2） 20 20根据该金属与足量盐酸反应，有0.2 mol电子发生转移，生成了6.02×1022个阳离子。M-xe-====Mx+，n（Mx+）mol=" 0.1" mol，即金属重4 g，其物质的量为0.1 mol，该金属...
