皮皮学，免费搜题
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【单选题】
( )是宝马汽车的故乡A.
法兰克福
B.
慕尼黑
C.
科隆
D.
柏林
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Recently he______ every night until after one o' clock, preparing for the final exam.
A.
shows up
B.
show off
C.
stays in
D.
stays up
【简答题】心肌细胞自动节律性形成的基础是?
【单选题】Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid _____ pressure.
A.
depending on
B.
in relative to
C.
regardless of
D.
because of
【单选题】The hot oils used for frying ______.
A.
is kept fresh every day
B.
may be used for a week
C.
should be changed every 3 days
D.
is changed from hour to hour
【单选题】心肌细胞自动节律性形成的基础是
A.
4 期自动缓慢去极化
B.
2 期Ca 2+ 内流
C.
4 期存在最大舒张电位
D.
0 期与Na + 内流有关
E.
3 期K + 外流
【单选题】'Life is like walking in the snow', Granny used to say, 'because every step [ ]
A.
has shown
B.
is showing
C.
shows
D.
showed
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