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【单选题】
下列关于细胞工程的叙述，不正确的是 [ ]A.
电刺激可诱导植物原生质体融合或动物细胞融合
B.
去除植物细胞壁和将动物组织分散成单个细胞均需酶处理
C.
小鼠骨髓瘤细胞和经抗原免疫的B淋巴细胞融合可制备单克隆抗体
D.
动植物细胞培养都需要经过脱分化处理
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【单选题】What refers to the depth of a petroleum product in a tank ________．
A.
Innage
B.
Outage
C.
Thievage
D.
Ullage
【单选题】What does Shell plan to do?
A.
Shell plans to cooperate with PetroChina in Nanhai Petroleum Chemical project.
B.
Shell plans to cooperate with PetroChina in the north-east gas transmission project.
C.
Shell plans to cooperate with China National Offshore Oil in Nanhai Petroleum Chemical project.
D.
Shell plans to cooperate with PetroChina in the west-east gas transmission project.
【单选题】下列水溶液沸点最低的是( )。
A.
0.01mol·dm -3 NaNO 3
B.
0.01mol·dm -3 HAc
C.
0.01mol·dm -3 BaCl 2
D.
0.01mol·dm -3 C 6 H 12 O 6
【单选题】—________________ —They’re books.
A.
Are these English books?
B.
What’s this?
C.
What’re these ?
【简答题】看图写句子。 1. A: What are they doing? B: They're ____________. 2. A: What ___________? B: They're _____________. 3. A:______________________? B:_______________________. 4. A:_______________________? B:___...
【简答题】What is petroleum refining?
【简答题】看图写句子。 A: What's it doing? B: It's __________. A: What are ____________? B: They're _________________. A: What are ___________? B: They're _____________. A: What _____________? B: They're __________.
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