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【多选题】
人参主根横切面的特征是()
A.
最外层为木栓层
B.
韧皮部散有树脂道
C.
形成层环多角形
D.
木质部断续排列成放射状
E.
细胞中含草酸钙簇晶
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参考答案:
举一反三
【单选题】何首乌来源于( )
A.
毛茛科
B.
蓼科
C.
豆科
D.
马兜铃科
E.
石竹科
【单选题】As the director can't come to the reception, I'm representing the company __________.
A.
on his account
B.
on his behalf
C.
for his part
D.
in his interest
【单选题】何首乌来源于
A.
B.
C.
D.
E.
【单选题】--------- Come and join us, Jim! ---------- I’m sorry I can’t . If I _______ time, I would certainly go.
A.
will have
B.
have had
C.
had
D.
had had
【单选题】[单选题]电动吊篮的离心触发式安全锁的触发机构是()。
A.
工作钢丝绳
B.
角度探测
C.
离心甩块
【单选题】电动吊篮的离心触发式安全锁的触发机构是( )。
A.
离心甩块
B.
角度探测
C.
工作钢丝绳
【单选题】单片机外部中断INT0,INT1,INT2的触发方式分别有( )种
A.
4,4,2
B.
1,2,3
C.
2,2,4
D.
4,4,4
【单选题】——Can you come and play basketball with us? ——______ .
A.
Sorry, I can't. I have to finish my homework first
B.
No, I am not. I'm very busy now
C.
Yes, I do. I like it very much
【单选题】电动吊篮的离心触发式安全锁的触发机构是()。
A.
工作钢丝绳
B.
角度探测
C.
离心甩块
【简答题】Thank you very much for your _________(invite). But I’m so sorry that I can’t come to your party tomorrow.
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