问题
多项选择题
造成往复泵打量不足的因素有()。
A.入口管线堵
B.介质温度偏高汽化
C.单向阀故障
D.活塞与缸体间隙太大
答案
参考答案:A, B, C, D
造成往复泵打量不足的因素有()。
A.入口管线堵
B.介质温度偏高汽化
C.单向阀故障
D.活塞与缸体间隙太大
参考答案:A, B, C, D
根据下列各句句意和空白之后的汉语提示词,在答题卷指定区域的横线上写出对应词的正确完整形式,每空只写一词。 小题1:We usually have a class meeting on __________ (星期一)afternoon. 小题2:It’s bad manners to __________ (打断……讲话)others when they are talking. 小题3:We know that __________ (克隆)brings us benefits as well as problems. 小题4:They are interested in talking about what they will do when they __________ (退休). 小题5:He found the road has blue and white signs with __________ (海鸥) on them to show the way to go.
小题7:We must give every __________ (文件) a different name while typing on computers. 小题8:I tried to phone Jackson this morning but I couldn’t get through. Later I found I __________ (拨) the wrong number. 小题9:__________ (通常;普遍地,一般地)speaking, when British meet, their talk will begin with weather. 小题10:If you are in need of help, don’t __________ (犹豫;踌躇) to ask me. |