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【多选题】
对于餐饮企业来说,微信给企业提供了一个( )的发展空间。A.
多渠道推广
B.
双向沟通
C.
c.提高服务质量
D.
多样化
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举一反三
【单选题】有关维生素D的下列叙述哪项是错误的
A.
维生素D3是主要发挥生理作用的D3形式
B.
维生素D3必须经过肝、肾二次羟化作用后，才能转变为活性维生素D3
C.
1，25 (OH) 2 D3具有促进钙磷吸收和促进骨盐更新的作用
D.
维生素D主要来源于动物性食物
E.
多晒太阳可以预防维生素D的缺乏
【单选题】_______ that it was already the fourth time that he _______ abroad.
A.
So lucky he was; traveled
B.
So lucky was he; traveled
C.
So lucky he was; had traveled
D.
So lucky was he; had traveled
【简答题】He will surely finish the job on time _____ he's left to do it in his own way. A. so that B. so long as C. in case D. for fear that
【单选题】He _________ English for eight years by the time he graduates from the university next year.
A.
will learn
B.
will have learned
C.
will be learning
D.
has graduated
【单选题】Was he ________to get to school on time when he got up at 7:45?
A.
possible
B.
impossible
C.
probable
D.
likely
【简答题】A.He is happy to share dessert with the woman． B.He didnt know what time to have lunch． C.He expected the traffic to be bad． D.He is not upset that they have had lunch．
【单选题】有关维生素D的下列叙述哪项是错误的（）
A.
维生素D3是主要发挥生理作用的D3形式
B.
维生素D3必须经过肝、肾二次羟化作用后，才能转变为活性维生素D
C.
1，25（OH）2VitD3具有促进钙磷吸收和促进骨盐更新的作用
D.
维生素D主要来源于动物性食物
E.
多晒太阳可以预防维生素D的缺乏
【单选题】Why is the man not able to find the book he needs?
A.
It's the first time he's come to the library.
B.
There's only one reading room in the library.
C.
He wants to refer to the book for some figures
【单选题】有关维生素D的叙述下列哪项是错误的
A.
维生素D是主要发挥生理作用的形式
B.
维生素D必须经过肝、肾二次羟化作用后，才能转变为活性维生素D
C.
1，25(0H)2D3具有促进钙磷吸收和促进骨盐更新的作用
D.
维生素D主要来源于动物性食物
E.
多晒太阳可以预防维生素D的缺乏
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