皮皮学，免费搜题
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【单选题】
大黄根茎的异常维管柬(星点)存在于( )A.
皮层中
B.
韧皮部中
C.
木质部中
D.
髓中
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】某市政工程队在夏季正午施工，铺筑路面水泥混凝土。选用缓凝减水剂。浇注完后表面未及时覆盖，后发现混凝土表面形成众多表面微细龟裂纹，请分析原因。
【简答题】Give talks on the following two colloborative tasks. You should treat them as tasks for yourself instead of for two people, and you can prepare for 3-5 minutes and then talk for 2-3 minutes. Record yo...
【单选题】You can also put “_______” or “FYI” at the beginning of the subject if you want to receive quick response from others.
A.
URGENT
B.
QUICK
C.
FAST
D.
AT ONCE
【单选题】You can also put “_______” or “FYI” at the beginning of the subject if you want to receive quick response from others.
A.
URGENT
B.
AT ONCE
C.
QUICK
D.
FAST
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