问题
单项选择题
无流道凝料浇注系统是指（）的浇注系统。
A.无主流道
B.无分流道
C.无浇口
D.成型后的塑件无流道凝料
答案
参考答案：D
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无流道凝料浇注系统是指（）的浇注系统。
A.无主流道
B.无分流道
C.无浇口
D.成型后的塑件无流道凝料
参考答案：D
用方框里适当的词填空。 | |
2. There's a new zebra in the zoo. It's from . 3. In spring, the weather gets and the trees green. 4. —Shall we at eight thirty at the school gate ? —OK. 5. —May I have some , Mum? —What , dear? —I want to a model plane. —Sure. Here you are. |