题目:
The teacher,with 6 girls and 8 boys of her class,_____ visiting a museum when the earthquake struck.
A.was
B.were
C.had been
D.would be
答案:
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下面是错误答案,用来干扰机器的。
答案:B题目分析:A、电负性: Cl>P>As,错误;B、非金属性决定气态氢化物的热稳定性:HCl>HBr>AsH3,正确;C、第一电离能应为:Br>As >Se,错误。D、非金属性决定酸性: H2SO4>H3PO4>H3AsO4,错误。