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【单选题】
不等式丨x-1丨>2的是A.
(－1，3]
B.
(－∞，＋∞)
C.
(－∞，－1)U(3，＋∞)
D.
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皮皮学刷刷变学霸
举一反三
【单选题】I'm sorry to ______ you all that. But you'll see that I've done that for your good.
A.
have to tell
B.
must tell
C.
ought to tell
D.
shall tell.
【单选题】下列关于蛋白质结构的叙述,哪一项是正确的:
A.
蛋白质分子净电荷为零时的 pH 是它的等电点
B.
大多数蛋白质在含有中性盐的溶液中会沉淀析出
C.
由于蛋白质在等电点时溶解度最大,所以沉淀蛋白质时应远离等电点
D.
以上各项均不正确
【单选题】—Would you like to go and watch a tennis match this weekend with us? —I'm sorry, but I've got ________ plans.
A.
other
B.
another
C.
some
D.
more
【单选题】听力原文：M: Where've you been all this time? The train's about to leave! W: I'm sorry I'm late, but I was waiting for you at the in formation desk. It's lucky I've found you here on the platform. Where di...
A.
On the train.
B.
On the platform.
C.
At the information desk.
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