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【单选题】
下列有关坍落度的叙述,哪一项不正确?A.
坍落度是表示塑性混凝土拌合物流动性的指标
B.
干硬性混凝土拌合物的坍落度小于10mm且需用维勃稠度(s)表示其稠度
C.
泵送混凝土拌合物的坍落度不低于100mm
D.
泵送混凝土拌合物的坍落度不应大于180mm
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【单选题】在环境与资源保护法中关于防治环境污染，尤其是控制有毒有害物质的规定体现的生态规律主要是
A.
“物物相关”律
B.
“相生相克”律
C.
“能流物复”律
D.
“负载定额”律
【简答题】Listen to a talk and complete the table below. Write the appropriate letters A-G against Questions 1-8. Places: Main Gymnasium Squash and Racquetball Fitness and Weight Room Multi-purpose Room Gym Equ...
【简答题】A．One is safe if he is very careful. B．Hi-tech safety equipment ensures one's safety. C．A lot of people do rock-climbing and they are OK. D．There are no erous places nearby to do rock-climbing.
【单选题】下列关于MHCI类分子的叙述,正确的是
A.
向T淋巴细胞递呈抗原时需要CD4分子提供辅助
B.
由两个相同的重链和两条相同的轻链组成
C.
向T淋巴细胞递呈外源性抗原
D.
向T淋巴细胞递呈抗原时需要CD8分子提供辅助
【单选题】关于MHCI类分子的叙述,下列正确的是
A.
MHC I类分子的肽链均为MHC编码
B.
参与B淋巴细胞的发育
C.
HLA I类分子由第6号染色体短臂上HLA复合体编码
D.
参与外源性抗原的提呈
【单选题】Nuclear energy is an efficient and convenient substitute for conventional forms of energy which were found in special geographical locations. Large amounts of 【B1】______ and effort are required to 【B2...
A.
capital
B.
incentive
C.
interest
D.
currency
【简答题】Listen to the passage and fill in the missing words: Exercise 2: Blank filling. 1. The cost of the hardware and computer software program is 1)___________ . 2. Kyra Constam of Blue Goji says the virtu...
【简答题】We all need to exercise. Doctors say it is good for us. It makes your heart and body strong. It also gives you more energy. Plus, you will feel better about yourself. It's best to exercise twice a wee...
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