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【单选题】
检测制冷剂纯度时要把海拔高度转换成英尺输入,100英尺约等于( )米。A.
300
B.
40
C.
35
D.
30
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【简答题】某 550M 邻频传输系统如图所示: 已知: 系统分配给前端的载噪比指标和非线性失真指标均为 10% ; 频道处理器的 S λ =65dB μ v , S 0 =120dB μ v , 噪声系数为 8dB ;混合器的损耗为 38dB ,宽带放大器 A 的增益为 20dB , C/CTB 0 =77dB , S 0 测 =98dB μ v ;四分配器的插入损耗为 7.5 dB , (1) 试验算射频...
【多选题】科学发展观的理论核心围绕着哪两条基础主线。
A.
努力把握人与自然之间关系的平衡
B.
努力实现人与人之间关系的协调
C.
努力 实现区域发展之间的平衡
D.
努力实现经济的快速发展目标
【单选题】( ) 58. The writer walked quickly but carefully out of the forest because he saw _________.
A.
a lot of birds
B.
a lot of insects
C.
many monkeys
D.
a small snake on the ground
【简答题】Read the passage carefully until you have got its main idea, and then select one appropriate word for each gap from the box following the passage. When he got the call that his son was ill in Californ...
【单选题】After the marathon, he was very tired. He walked...to the dressing room.
A.
nicely
B.
carefully
C.
slowly
D.
fast
【多选题】科学发展观的理论核心围绕着哪两条基础主线。
A.
努力把握人与自然之间关系的平衡
B.
努力实现区域发展之间的平衡
C.
努力实现人与人之间关系的协调
D.
努力实现经济的快速发展目标
【简答题】用正确的连接词填空,注意首字母大写. 状语从句引导词 before, after, when , though , if , because, so that. __________ you pay for the goods, you'd better check it carefully. You need to look at the price carefully_________ you...
【单选题】He walked carefully so as not to wet his shoes.
A.
adj. → n.
B.
adj. → adv.
C.
adj. → v.
D.
prep. → adv.
【简答题】用before,after,when,though,if,because,so that完成以下句子。 ________ you pay for the goods, you'd better check it carefully. You need to look at the price carefully ________ you are shopping. ________ I walke...
【简答题】Complete the following sentences with before, after, when, though, if ,because, or so that. 1._________ you pay for the goods , you’d better check it carefully. 2. You need to look at the price carefu...
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