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【多选题】
可直接毒害细胞,导致组织损伤的是
A.
有机酸
B.
硫化氢
C.
吲哚
D.
短链脂肪酸
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】图示为一台小型发电机的示意图 , 矩形线圈在匀强磁场中绕 OO' 轴匀速转动 , 磁场方向与转轴垂直。矩形线圈的面积 S= 2 . 0 × 10 - 2 m 2 , 匝数 N= 40, 线圈电阻 r= 1 . 0 Ω, 磁场的磁感应强度 B= 0 . 20 T 。线圈绕 OO' 轴以 ω= 100 rad / s 的角速度匀速转动。线圈两端外接电阻 R= 9 . 0 Ω 的小灯泡和一个理想交流电流...
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【单选题】What do the two persons want to do?
A.
To drink a lot of liquids.
B.
To stay at home.
C.
To stay at home to spare the heat.
D.
To stand this kind of scorching heat.
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【简答题】听下面一段材料，回答第1-4小题。 1. How many persons were there in the room when someone was knocking at the door? [     ] A. One person. B. Two persons. C. Three persons. 2. What did the young man wear? [     ] A. ...
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【单选题】一个矩形线圈在匀强磁场中绕垂直于磁感线的轴匀速转动,穿过线圈的磁通量随时间变化的图象如图 9 甲所示,则下列说法中正确的是 ( )
A.
． t ＝ 0 时刻，线圈平面与中性面垂直
B.
． t ＝ 0.01 s 时刻， Φ 的变化率最大
C.
． t ＝ 0.02 s 时刻，交变电动势达到最大
D.
．该线圈产生的相应交变电动势的图象如图乙所示
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【简答题】听下面一段对话，完成第1至3题。 1. How many persons are mentioned in the conversation? A. 2. B. 4. C. 5. 2. What's the relationship between the two speakers? A. Friends. B. Husband and wife. C. Employer and employee...
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【简答题】听材料，回答问题。 1. How many persons are going to see Betty off at the airport? [     ] A. Only one. B. Two. C. Three. 2. Where will Betty stay in Guangzhou? [     ] A. In a hotel. B. In her brother's home. ...
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【简答题】听下面一段材料，回答地1-3题。 1. How many persons are mentioned in the conversation? A. 2. B. 4. C. 5. 2. What's the relationship between the two speakers? A. Friends. B. Husband and wife. C. Employer and employee...
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【单选题】进气歧管绝对压力传感器是一种 测量空气流量的传感器。
A.
直接
B.
间接
C.
快速
D.
低速
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【简答题】Two persons start from the same location O and walk around a square in opposite directions with constant speeds. The square is 30m by 30m. A’s speed is 2m/s and B’s speed is 1m/s. Find the coordinates...
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【单选题】进气歧管绝对压力传感器是一种( )测量空气流量的传感器
A.
直接
B.
间接
C.
慢速
D.
快速
查看完整题目与答案
相关题目：
【简答题】图示为一台小型发电机的示意图 , 矩形线圈在匀强磁场中绕 OO' 轴匀速转动 , 磁场方向与转轴垂直。矩形线圈的面积 S= 2 . 0 × 10 - 2 m 2 , 匝数 N= 40, 线圈电阻 r= 1 . 0 Ω, 磁场的磁感应强度 B= 0 . 20 T 。线圈绕 OO' 轴以 ω= 100 rad / s 的角速度匀速转动。线圈两端外接电阻 R= 9 . 0 Ω 的小灯泡和一个理想交流电流...
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【单选题】What do the two persons want to do?
A.
To drink a lot of liquids.
B.
To stay at home.
C.
To stay at home to spare the heat.
D.
To stand this kind of scorching heat.
查看完整题目与答案
【简答题】听下面一段材料，回答第1-4小题。 1. How many persons were there in the room when someone was knocking at the door? [     ] A. One person. B. Two persons. C. Three persons. 2. What did the young man wear? [     ] A. ...
查看完整题目与答案
【单选题】一个矩形线圈在匀强磁场中绕垂直于磁感线的轴匀速转动,穿过线圈的磁通量随时间变化的图象如图 9 甲所示,则下列说法中正确的是 ( )
A.
． t ＝ 0 时刻，线圈平面与中性面垂直
B.
． t ＝ 0.01 s 时刻， Φ 的变化率最大
C.
． t ＝ 0.02 s 时刻，交变电动势达到最大
D.
．该线圈产生的相应交变电动势的图象如图乙所示
查看完整题目与答案
【简答题】听下面一段对话，完成第1至3题。 1. How many persons are mentioned in the conversation? A. 2. B. 4. C. 5. 2. What's the relationship between the two speakers? A. Friends. B. Husband and wife. C. Employer and employee...
查看完整题目与答案
【简答题】听材料，回答问题。 1. How many persons are going to see Betty off at the airport? [     ] A. Only one. B. Two. C. Three. 2. Where will Betty stay in Guangzhou? [     ] A. In a hotel. B. In her brother's home. ...
查看完整题目与答案
【简答题】听下面一段材料，回答地1-3题。 1. How many persons are mentioned in the conversation? A. 2. B. 4. C. 5. 2. What's the relationship between the two speakers? A. Friends. B. Husband and wife. C. Employer and employee...
查看完整题目与答案
【单选题】进气歧管绝对压力传感器是一种 测量空气流量的传感器。
A.
直接
B.
间接
C.
快速
D.
低速
查看完整题目与答案
【简答题】Two persons start from the same location O and walk around a square in opposite directions with constant speeds. The square is 30m by 30m. A’s speed is 2m/s and B’s speed is 1m/s. Find the coordinates...
查看完整题目与答案
【单选题】进气歧管绝对压力传感器是一种( )测量空气流量的传感器
A.
直接
B.
间接
C.
慢速
D.
快速
查看完整题目与答案