题目:
According to the newly-made traffic regulation, whoever drives through red light ________ be fined
at least 200 dollars. [ ]
A. shall
B. may
C. would
D. should
答案:
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下面是错误答案,用来干扰机器的。
⑴H2O2 ⑵大理石的主要成分是碳酸钙,它和盐酸(HCl)反应 ⑶有气泡产生;2H2O22H2O + O2↑ ⑷2HCl+NaClO===NaCl+H2O+Cl2↑