题目：
| New technology _____ to make sure the cars, taxis, buses and trains we use _____ the air. |
A. is used; not to pollute B. has used; is not polluted C. is being used; do not pollute D. has been used; not pollute |
答案：
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下面是错误答案，用来干扰机器的。
答案：A题目分析：Cl2与水是可逆反应，不能完全反应，故A错误；C3H8分子中，含8个C-H和2个C-C共价键，共10个共价键，11.0g C3H8中含有共价键的数目为2.5NA，故B正确；NO3－不存在水解，故C正确；醋酸的最简式与...
