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【判断题】
突触前、后成分彼此相对的细胞膜分别称为突触前膜和突触后膜。A.
正确
B.
错误
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【单选题】( ) 是用一个单位长度(如 1 厘米)表示一定的数量,根据数量的多少,面成长短相应成比例的直条,并按一定顺序排列起来的统计图。
A.
条形图
B.
面积图
C.
饼图
D.
折线图
【单选题】When the waiter recommend some vegetables for the guest, he could use the sentence pattern to recommend:___________________.
A.
Would you like some vegetables for your lunch?
B.
Are you ready to order now?
C.
Hope you enjoy your meal.
D.
You have order......Am I correct?
【简答题】*.如附图所示,两槽敞口,已知离心泵吸入管路直径 d1 = 80mm,吸入管长为 6m,吸入管摩擦阻力系数为0.02;压出管路直径d2 = 60mm,管长为13m,摩擦阻力系数为0.03。管路中流量为1.2× /s,阀门E局部阻力系数为6.4,吸入管段和压出管段各有一90°弯头,该局部阻力系数为0.75。求: (1)吸入管段总阻力为( )/kg; (2)压出管路总阻力为( )J...
【单选题】—Can I use your dictionary? —I __ _ I could lend it to you, but it's at home. [ ]
A.
hope
B.
think
C.
wish
D.
am afraid
【单选题】听力原文： Could you tell me where the talk on International Banking is going to take place? It says in the programme that it's in Room 121 but I've just been up there and it's empty. I hope it hasn't been...
A.
waiter
B.
conference delegate
C.
builder
D.
bank manager
E.
hotel receptionist
F.
security guard
G.
telephone engineer
H.
secretary
【简答题】用离心泵把水从储槽送至附图所示,表压为1kgf.cm-2的水洗塔中,储槽液面恒定,其上方为大气压。在某输送量下,泵对每kg水作的功为317.7J.kg-1,管内的摩擦系数为0.018。泵的吸入管路和压出管路总长分别为10m及100m(包括管件及入口的当量长度,但不包括出口的当量长度),管子采用Φ108×4mm的钢管。若在泵的出口处装一压力表,而测压处与泵入口处之间的位差和摩擦阻力均可忽略不计,试求...
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