Our teacher demanded that all of us ____

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问题选择题

Our teacher demanded that all of us ______ English every day.

A．should practise to speak

B．would practise speaking

C．could practise speaking

D．practise speaking

答案

答案：D

选择题

1 mol·L^－1H₂SO₄溶液的含义是[ ]

A．1 L水中含有1 mol H₂SO₄

B．1 L溶液中含有1 mol H^＋

C．将98 g H₂SO₄溶于1 L水中配成溶液

D．1 L H₂SO₄溶液中含98 g H₂SO₄

单项选择题

硫黄的功效是

A．外用杀虫止痒，内服壮阳通便

B．外用攻毒杀虫，内服利水通便

C．解毒，杀虫，燥湿祛痰

D．只作为外用，功专杀虫止痒

E．外用解毒止痒，内服坠痰截疟