皮皮学，免费搜题
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【多选题】
放大电路的主要技术指标有( )。
A.
放大倍数
B.
输入电阻 R i
C.
输出电阻 R o
D.
最大输出幅度
E.
非线性失真系数 D
F.
通频带
G.
最大输出功率与效率
拍照语音搜题，微信中搜索"皮皮学"使用
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【多选题】图为一皮带传动装置,右轮的半径为r,a是它边缘上的一点,左侧是一轮轴,大轮的半径是4r,小轮的半径为2r,b点在小轮上,到小轮中心的距离为r,c点和d点分别位于小轮和大轮的边缘上,若在传动过程中,皮带不打滑,则( )
A.
a点与b点的线速度大小相等
B.
a点与b点的角速度大小相等
C.
a点与c点的线速度大小相等
D.
a点与d点的向心加速度大小相等
查看完整题目与答案
【单选题】Look at the terms about language learning and the three classroom activities listed A, B and C. Two of the activities are examples of the term. One activity is NOT. Choose the letter (A, B or C) of th...
A.
The learners had to decide if certain verbs are followed by the gerund or the infinitive.
B.
The learners matched words to explanations of their meanings to complete an exercise.
C.
The learners ticked which word they heard in sets of minimal pairs.
查看完整题目与答案
【多选题】The network administrator must complete the connection between the RTA of the XYZ Company and the service provider. To accomplish this task, which two devices could be installed at the customer site t...
A.
WAN switch
B.
PVC
C.
ATM switch
D.
multiplexer
E.
CSU/DSU
F.
modem
查看完整题目与答案
【判断题】没有发现有棉花枯萎病的棉区，不需要考虑带菌棉种的检疫。
A.
正确
B.
错误
查看完整题目与答案
【单选题】建设单位与施工单位签订合同时,工程造价依据是。
A.
施工图预算
B.
概算
C.
施工预算
D.
工程结算
查看完整题目与答案
【单选题】Look at the terms about language learning and the three classroom activities listed A, B and C. Two of the activities are examples of the term. One activity is NOT. Choose the letter (A, B or C) of th...
A.
The learner listened to a recording and wrote down the words he didn’t know.
B.
A learner discussed with his teacher why his answer was correct.
C.
A group of learners designed a poster together.
查看完整题目与答案
【单选题】直线回归方程中,若回归系数为负,则
A.
表明现象正相关
B.
表明现象负相关
C.
表明相关程度很弱
D.
不能说明相关方向和程度
查看完整题目与答案
【单选题】Look at the terms about language learning and the three classroom activities listed A, B and C. Two of the activities are examples of the term. One activity is NOT. Choose the letter (A, B or C) of th...
A.
The learners completed a gapped text by reading the words around each gap.
B.
The learners listened to a recording and counted the stressed syllables in each word.
C.
The learners listened to short dialogues and deduced who the speakers were.
查看完整题目与答案
【单选题】“西控巴蜀收万壑”,锁全川水的险要气势是长江三峡的()。
A.
西陵峡
B.
三峡
C.
巫峡
D.
瞿塘峡
查看完整题目与答案
【多选题】右图中所示为一皮带传动装置,右轮的半径为 r , a 是它边缘上的一点。左侧是一轮轴,大轮的半径为 4r ,小轮的半径为 2r 。 b 点在小轮上,到小轮中心的距离为 r 。 c 点和 d 点分别位于小轮和大轮的边缘上。若在传动过程中,皮带不打滑。则 ( )
A.
a点与d点的向心加速度大小相等
B.
a点与b点的角速度大小相等
C.
a点与c点的线速度大小相等
D.
a点与b点的线速度大小相等
查看完整题目与答案
相关题目：
【多选题】图为一皮带传动装置,右轮的半径为r,a是它边缘上的一点,左侧是一轮轴,大轮的半径是4r,小轮的半径为2r,b点在小轮上,到小轮中心的距离为r,c点和d点分别位于小轮和大轮的边缘上,若在传动过程中,皮带不打滑,则( )
A.
a点与b点的线速度大小相等
B.
a点与b点的角速度大小相等
C.
a点与c点的线速度大小相等
D.
a点与d点的向心加速度大小相等
查看完整题目与答案
【单选题】Look at the terms about language learning and the three classroom activities listed A, B and C. Two of the activities are examples of the term. One activity is NOT. Choose the letter (A, B or C) of th...
A.
The learners had to decide if certain verbs are followed by the gerund or the infinitive.
B.
The learners matched words to explanations of their meanings to complete an exercise.
C.
The learners ticked which word they heard in sets of minimal pairs.
查看完整题目与答案
【多选题】The network administrator must complete the connection between the RTA of the XYZ Company and the service provider. To accomplish this task, which two devices could be installed at the customer site t...
A.
WAN switch
B.
PVC
C.
ATM switch
D.
multiplexer
E.
CSU/DSU
F.
modem
查看完整题目与答案
【判断题】没有发现有棉花枯萎病的棉区，不需要考虑带菌棉种的检疫。
A.
正确
B.
错误
查看完整题目与答案
【单选题】建设单位与施工单位签订合同时,工程造价依据是。
A.
施工图预算
B.
概算
C.
施工预算
D.
工程结算
查看完整题目与答案
【单选题】Look at the terms about language learning and the three classroom activities listed A, B and C. Two of the activities are examples of the term. One activity is NOT. Choose the letter (A, B or C) of th...
A.
The learner listened to a recording and wrote down the words he didn’t know.
B.
A learner discussed with his teacher why his answer was correct.
C.
A group of learners designed a poster together.
查看完整题目与答案
【单选题】直线回归方程中,若回归系数为负,则
A.
表明现象正相关
B.
表明现象负相关
C.
表明相关程度很弱
D.
不能说明相关方向和程度
查看完整题目与答案
【单选题】Look at the terms about language learning and the three classroom activities listed A, B and C. Two of the activities are examples of the term. One activity is NOT. Choose the letter (A, B or C) of th...
A.
The learners completed a gapped text by reading the words around each gap.
B.
The learners listened to a recording and counted the stressed syllables in each word.
C.
The learners listened to short dialogues and deduced who the speakers were.
查看完整题目与答案
【单选题】“西控巴蜀收万壑”,锁全川水的险要气势是长江三峡的()。
A.
西陵峡
B.
三峡
C.
巫峡
D.
瞿塘峡
查看完整题目与答案
【多选题】右图中所示为一皮带传动装置,右轮的半径为 r , a 是它边缘上的一点。左侧是一轮轴,大轮的半径为 4r ,小轮的半径为 2r 。 b 点在小轮上,到小轮中心的距离为 r 。 c 点和 d 点分别位于小轮和大轮的边缘上。若在传动过程中,皮带不打滑。则 ( )
A.
a点与d点的向心加速度大小相等
B.
a点与b点的角速度大小相等
C.
a点与c点的线速度大小相等
D.
a点与b点的线速度大小相等
查看完整题目与答案