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【简答题】
营养繁殖的方法有： （1）______：是剪取一段带有______的枝条，将其下部插入湿润的土壤中．、______、______、葡萄、月季、蔷薇等植物这种方法繁殖． （2）嫁接：包括______和______两种方式．嫁接要确保接穗和砧木的______紧密结合．如______、梨、______等很多果树都是利用嫁接来繁育优良品种的． （3）压条：一般扦插______的植物可用此方法繁殖．如桂花、______、藏报春等．
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参考答案：
举一反三
【单选题】轮齿弯曲强度计算中的齿形系数 Y Fa 与 无关。
A.
齿数
B.
变位系数
C.
模数
D.
斜齿轮的螺旋角
查看完整题目与答案
【单选题】The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work.
A.
unconditionally
B.
unwillingly
C.
unfortunately
D.
uncomfortably
查看完整题目与答案
【单选题】齿轮弯曲强度计算中的齿形系数 Y Fa 反映了 对齿轮弯曲强度的影响。
A.
轮齿的形状
B.
轮齿的大小
C.
齿面硬度
D.
齿面粗糙度
查看完整题目与答案
【简答题】A．They may fail to feel secure later in the life. B．They may become bad-tempered. C．They may develop mental problems. D．They may lose trust in the society.
查看完整题目与答案
【简答题】A．They may be homesick, and feel insecure. B．They may try to attract other people's attention. C．They are either cold or very sick. D．They want to protect themselves from physical injuries.
查看完整题目与答案
【判断题】桥式整流电容滤波电路中的滤波电容一般采用电解电容,因为其容量越大,滤波效果越好。A. 对 B. 错
A.
正确
B.
错误
查看完整题目与答案
【单选题】启动线程时，需要调用（ ）方法。
A.
start()
B.
run()
C.
currentThread()
D.
join()
查看完整题目与答案
【单选题】启动主线程时，（ ）。
A.
需要调用start()方法
B.
需要调用run()方法
C.
需要调用currentThread()方法
D.
不需要调用任何方法
查看完整题目与答案
【单选题】Which TWO of the following apply to shares of companies whose names end in ‘Ltd’? (1) They may not be issued to non-members (2) They may not be offered to the public (3) They may not be transferred (4...
A.
(1) and (2)
B.
(2) and (3)
C.
(1) and (4)
D.
(2) and (4)
查看完整题目与答案
【简答题】A．They may be homesick and feel insecure. B．They may try to attract other people's attention. C．They are either cold or sick. D．They want to protect themselves from physical injuries.
查看完整题目与答案
相关题目：
【单选题】轮齿弯曲强度计算中的齿形系数 Y Fa 与 无关。
A.
齿数
B.
变位系数
C.
模数
D.
斜齿轮的螺旋角
查看完整题目与答案
【单选题】The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work.
A.
unconditionally
B.
unwillingly
C.
unfortunately
D.
uncomfortably
查看完整题目与答案
【单选题】齿轮弯曲强度计算中的齿形系数 Y Fa 反映了 对齿轮弯曲强度的影响。
A.
轮齿的形状
B.
轮齿的大小
C.
齿面硬度
D.
齿面粗糙度
查看完整题目与答案
【简答题】A．They may fail to feel secure later in the life. B．They may become bad-tempered. C．They may develop mental problems. D．They may lose trust in the society.
查看完整题目与答案
【简答题】A．They may be homesick, and feel insecure. B．They may try to attract other people's attention. C．They are either cold or very sick. D．They want to protect themselves from physical injuries.
查看完整题目与答案
【判断题】桥式整流电容滤波电路中的滤波电容一般采用电解电容,因为其容量越大,滤波效果越好。A. 对 B. 错
A.
正确
B.
错误
查看完整题目与答案
【单选题】启动线程时，需要调用（ ）方法。
A.
start()
B.
run()
C.
currentThread()
D.
join()
查看完整题目与答案
【单选题】启动主线程时，（ ）。
A.
需要调用start()方法
B.
需要调用run()方法
C.
需要调用currentThread()方法
D.
不需要调用任何方法
查看完整题目与答案
【单选题】Which TWO of the following apply to shares of companies whose names end in ‘Ltd’? (1) They may not be issued to non-members (2) They may not be offered to the public (3) They may not be transferred (4...
A.
(1) and (2)
B.
(2) and (3)
C.
(1) and (4)
D.
(2) and (4)
查看完整题目与答案
【简答题】A．They may be homesick and feel insecure. B．They may try to attract other people's attention. C．They are either cold or sick. D．They want to protect themselves from physical injuries.
查看完整题目与答案
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