皮皮学，免费搜题
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【多选题】
屏蔽门的结构包括( )。A.
滑动门
B.
应急门
C.
端门
D.
固定门
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】—Must I finish the work today, mom ? —No, you ______.You can finish it tomorrow.
A.
mustn’t
B.
can’t
C.
shouldn’t
D.
needn’t
【单选题】—Must I finish the work today, Mom? —No, you _____. You can finish it tomorrow. [ ]
A.
mustn't
B.
needn't
C.
shouldn't
D.
can't
【单选题】— Mom, must I finish my homework now? — No, you ______. You may have supper first.
A.
needn't
B.
can't
C.
mustn't
【单选题】—Must I finish the work today, Mom? —No, you . You can finish it tomorrow .
A.
mustn’t
B.
can’t
C.
needn’t
【单选题】----Must I finish the work today, Mom? ----No, you _______________. You can finish it tomorrow.
A.
mustn’t
B.
can’t
C.
needn’t
D.
shouldn’t
【单选题】—Mom, must I finish my homework now? —No, you _____. You may have supper first.
A.
mustn't
B.
needn't
C.
can't
D.
above is all right
【单选题】— Mom, must I finish my homework now? — No, you ______. You may have supper first.
A.
mustn’t
B.
needn’t
C.
can’t
【简答题】大风障畦又分()和()两种。完全风障高为()，并夹附高()左右的披风，披风较厚。春季防风的有效范围是()左右。简易风障()只设置一排篱笆，高度()，防风效果较差。
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