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【单选题】
()是中国第一大淡水湖。A.
洞庭湖
B.
青海湖
C.
纳木错
D.
鄱阳湖
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举一反三
【简答题】He is becoming more and more (act) ______ in sports and music.
【单选题】.He went to the States in 1910,by _________ time he had learnt to dance and act in comedies.
A.
that
B.
the
C.
which
D.
whose
【单选题】. He _______ to act out the story he had read, but he failed.
A.
deserved
B.
tried
C.
managed
D.
pretended
【单选题】奶酪是由牛乳腺上皮细胞分泌的乳汁浓缩制成的营养品。检测得知，牛乳汁中含有乳糖、乳脂、酪蛋白、抗体等成分。下列叙述正确的是（ ）。
A.
利用双缩脲试剂可检测并鉴别出酪蛋白或抗体
B.
乳糖可直接被细胞吸收参与能量代谢
C.
乳脂的合成、抗体的加工均需内质网参与
D.
酪蛋白可被小肠上皮细胞以主动运输的方式吸收
【单选题】He ______ unwisely, but he was at least trying to do something helpful[1999]
A.
may have acted
B.
must have acted
C.
should act
D.
would act
【简答题】He is ardently______(act)for the cause of environmental protection.
【单选题】- ______ he _____ on the farm(农场)? -Yes, he does. He' s a good farmer. [ ]
A.
Does, work
B.
Is, working
C.
Does, do
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