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【单选题】
熟碱水的配制方法是:4500克开水加500克碱面和()石灰水,搅拌融化后,再加冷水4500克,静置澄清去渣即可。A.
100克
B.
150克
C.
200克
D.
250克
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【单选题】This year I _____Thanksgiving cards to the volunteers.
A.
sent out
B.
sent up
C.
sent round
D.
sent away
【单选题】I was 8 years old when my father was 31. this year my father is twice my age. How old am I?
A.
21
B.
22
C.
23
D.
24
【单选题】Mosquitoes are more likely to bite people _____.
A.
who wear white clothes
B.
who are short and thin
C.
who just finished exercising
D.
who smell sweet
【单选题】Which mosquitoes are primary vectors of malaria?
A.
a. Male Anopheles
B.
b. Female Anopheles
C.
c. Male Aedes
D.
d. Female Aedes
【单选题】用HCl标准溶液测定硼砂(Na 2 B 4 O 7 ·10H 2 O)试剂的纯度,有时会出现含量超过100%的情况,可能的原因是
A.
试剂不纯
B.
试剂吸水
C.
试剂失水
D.
试剂吸收杂质
【简答题】中英文互译。 (1)SMT ______ (2)THT_____ (3)印制电路板_____ (4)表面组装印制板____
【单选题】I was 8 years old when my father was 31. This year my father is twice my age. How old am I?
A.
21
B.
22
C.
23
D.
24
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