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【多选题】
对瑕点同为【图片】,满足【图片】,下列叙述正确的是
A.
若瑕积分 (瑕点为 ) 收敛 ,则 瑕积分 (瑕点为 ) 收敛
B.
若瑕积分 (瑕点为 ) 收敛 ,则 瑕积分 (瑕点为 ) 收敛
C.
若瑕积分 (瑕点为 )发散 ,则 瑕积分 (瑕点为 )发散
D.
若瑕积分 (瑕点为 ) 发散 ,则 瑕积分 (瑕点为 ) 发散
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皮皮学刷刷变学霸
举一反三
【简答题】Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for ...
【单选题】脚垫的安装需保证踏板区域内下肢运动或操作通畅又无阻且防滑,在行驶中确保( )
A.
美观
B.
全包
C.
舒适
D.
牢靠的固定且不妨碍操纵踏板
【简答题】Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for ...
【多选题】楼顶基站发电相关安全要求,以下哪些正确?
A.
楼顶如有青苔或积水,应绕行或垫放砖块,小步行走,严禁跳跃。
B.
如果楼顶为石棉瓦等不坚固材料,应尽量避免踩踏。必须踩踏时应在上面铺上木板,防止石棉瓦碎裂导致人员受伤。
C.
如楼顶有隔热板时,应尽量避免踩踏。必须踩踏时,脚要踩在两块隔热板搭边部位。
D.
如需攀爬外墙爬梯,应事先确认爬梯是否安全可靠,不能盲目攀爬。
【单选题】安全踏垫
A.
Safety mat
B.
safety lock
【单选题】骑自行车上路时,哪种行为是不安全的?( )
A.
不满12周岁的小朋友不准在道路上骑自行车
B.
出发之前,应该先检查一下铃、锁、刹车、车轮、踏脚、链条、坐垫等是否完好有效
C.
在道路上骑车时,应当在非机动车车道顺序行驶
D.
骑车转弯时,不伸手示意
【简答题】Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for ...
【简答题】Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for ...
【单选题】骑自行车上路时,哪种行为是不安全的?()
A.
不满12岁的小朋友不准在道路上骑自行
B.
出发之前,应该先检查一下铃、锁、刹车、车轮、踏脚、链条、坐垫等是否完好有效
C.
在道路上骑车时,应当在非机动车车道内顺序行驶
D.
骑车转弯时,不伸手示意
【简答题】Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for ...
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