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【单选题】
关于植物样品的酸度,下列说法错误的是A.
植物样品的总酸度，是所有酸性成分的总和，可用标准碱滴定进行确定
B.
植物样品的有效酸度，是味觉真正感受到的酸度，通常用pH计测定
C.
植物样品中的挥发性酸，通常存在于霉烂的果蔬籽粒中，可以加碱进行蒸馏滴定。
D.
植物样品中的有机酸都是弱酸
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【单选题】---How about your trip to Italy? ---Oh, ________ the fine weather, we enjoyed ourselves indeed.
A.
in regard to
B.
thanks to
C.
in spite of
D.
regardless of
【单选题】— How about your trip to Japan? — We haven‘t decided yet. But I‘ll let you know as soon as we the final decision.
A.
make
B.
made
C.
will make
D.
are making
【单选题】— How about your trip to the seaside? — Great! I enjoyed ______ in the sea. [ ]
A.
swimming
B.
to swim
C.
swim
D.
swims
【单选题】---Do you often go there to play basketball? --- Yes, ____it rains heavily.
A.
except for
B.
in addition
C.
only if
D.
except where
【单选题】— What color is your bag? — ______. [ ]
A.
Red
B.
Yes, it is
C.
Yes, it's red
D.
C-O-L-O-R
【简答题】—How about your trip to Europe? —P_________ (相当) good.
【简答题】电力机车本身并没有设置原动机,它通过()从接触网获得电能。
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