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【单选题】
淀粉质原料中的灰分主要是A.
镁
B.
钾
C.
磷
D.
硫
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举一反三
【单选题】In summer, women like to wear clothes _________ silk. They feel _________. [ ]
A.
made of, comfortable
B.
are made of, comfortable
C.
made of, comfortably
D.
are made of, comfortably
【判断题】Silk is a natural protein fiber obtained from the cocoons of the silkworm.
A.
正确
B.
错误
【单选题】Hangzhou ________ as the City of Silk. Tourists like shopping for silk there.
A.
be known
B.
as known
C.
is known
D.
is knowing
【单选题】_______about the super thin material, she touched it and learned that it ______ like silk. [ ]
A.
Curiously; feels
B.
Being curious; was felt
C.
Curious; feels
D.
Being curious; felt
【单选题】下列有关维生素D的叙述，错误的是
A.
维生素D的活性形式是1,25-(OH)2- D2
B.
维生素D为类固醇衍生物
C.
活性维生素D可促进小肠对钙磷的吸收
D.
缺乏维生素D的成人易发生骨软化症
E.
维生素D的羟化作用主要在肝肾中进行
【单选题】下列有关维生素D的叙述，错误的是
A.
维生素D的活性形式是1，24-(OH)-D3
B.
维生素D为类固醇衍生物
C.
活性维生素D可促进小肠对钙磷的吸收
D.
缺乏维生素D的成人易发生骨软化症
E.
维生素D的羟化作用主要在肝肾中进行
【单选题】听力原文：M: I'd like to have a look at this silk tie. How much does it cost. W: One is six dollars, but you'll save one dollar for each ifyou buy a dozen. How much will the man pay for a dozen ties? (13)
A.
48 dollars.
B.
60 dollars.
C.
71 dollars.
D.
72 dollars.
【单选题】Hangzhou ________ as the City of Silk. Tourists like shopping for silk there.
A.
knows
B.
is known
C.
was known
D.
will be known
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