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【单选题】
用于防治角膜软化症、干眼病、夜盲症及皮肤粗糙等的是A.
维生素A
B.
维生素D
C.
钙
D.
磷
E.
亚硒酸钠
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】资本主义制度最终确立的标志是()。
A.
资本原始积累的完成
B.
资产阶级政权的建立
C.
资产阶级政治统治的建立和资本主义生产方式支配地位的形成
D.
资本主义生产方式的形成
【单选题】A refuse collection becomes a "sanitary engineer" because ______.
A.
"refuse collector" is a job people don't like to do
B.
"refuse collector" is too formal
C.
people enjoy freedom in their choice of words
D.
the elegancy of language is admired by the American people
【单选题】What does “He wisely refuse to spend his money.”mean?
A.
it was wise of him to refuse to spend his money
B.
[B]he refuse to spend his money in a wise manner
C.
he was short of money and didn’t want to buy anything
D.
he refuse,in a wise manner, to spent his money.
【单选题】The environmentalists and wild goats' _____ on the vast grasslands was a good indication of the better environment. [ ]
A.
escape
B.
absence
C.
attendance
D.
appearance
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