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【多选题】
叶片泵可以分为（）。A.
内啮合
B.
外啮合
C.
单作用
D.
双作用
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【简答题】A.polluting B.be polluted C.polluted D.to be polluted
【单选题】Many rivers ________. [ ]
A.
have became polluted
B.
have become polluted
C.
have been polluting
D.
have become polluting
【单选题】患者男，9岁3个月，小学三年级学生，第1胎。母孕期胎儿胎动较多，动作幅度较大。由于“胎盘老化”，于预产期前1周出生，顺产，Apgar评分为10分。1岁会讲话、走路，明显较其他婴儿“费神”，学步期间不断摔伤膝部、下颌等部位。3岁入幼儿园，活动明显较多，喜欢参加幼儿园中的各种游戏，是班上的“活跃分子”。6岁入小学，很快熟悉班级及学校情况，上课时不断与同学讲话，当同学不与之说话时则自言自语，或学小狗叫。...
A.
学习困难
B.
注意缺陷多动障碍
C.
广泛性发育障碍
D.
抽动障碍
E.
童年广泛性焦虑障碍
【简答题】A．industrially polluted soils B．rock and soil chemistry C．naturally polluted soils D．the pathways of matals into the food chain E．the element of iodine F．the persistence of heavy metals 第 27 题 Some di...
【简答题】在我们手里的等高线分层设色地形图上，浅紫色表示（）
【简答题】Ocean waters around America have become polluted by ______.
【单选题】water will make the fish in the pond .
A.
Polluting; die away
B.
Being polluted; die off
C.
Polluted; die out
D.
Pollution; die down
【单选题】The water in this river is harmful because It’s a ______ river.
A.
pollution
B.
polluted
C.
has polluted
D.
pollutes
【简答题】A．How to find the way to exam polluted sea fish. B．Sea fish will be polluted when you eat it next time. C．More and more sea fish will be polluted soon. D．Sea fish will be free from oil pollution.
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