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【简答题】
把质量为0.5kg的石块从10m高处以30°角斜向上方抛出,初速度是v0=5m/s.不计空气阻力. 请问石块落地时的速度是多大?
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】燃气涡轮发动机的滑油系统一般分为：
A.
增压系统、回油系统、加热系统
B.
增压系统、减压系统、通气系统和指示系统
C.
供油系统、增压系统、冷却系统和探测系统
D.
供油系统、回油系统、通气系统和指示系统
【单选题】The clavipectoral fascia is penetrated by which artery?
A.
Anterior circumflex humeral
B.
Axillary
C.
Subscapular
D.
Thoracoacromial
E.
Thoracodorsal
【简答题】请简述现代船用柴油机提高经济性的主要措施。
【单选题】For the clavipectoral fascia which of the following is not correct?
A.
It is the deep fascia connecting among the coracoid process, subclavius and pectoralis minor.
B.
The lateral pectoral nerve passes through it.
C.
The thoracoacromial artery passes through it.
D.
The medial pectoral nerve passes through it
E.
The cephalic vein passes through it.
【单选题】The following structures pass through the clavipectoral fascia, except
A.
Cephalic vein
B.
Thoracoacromial artery
C.
Lateral pectoral nerve
D.
Thoracoacromial vein
E.
Medial pectoral nerve
【单选题】According to President F. D. Roosevelt, the funds for basic research in public colleges and universities would he ______.
A.
endowed by state government
B.
provided by federal government
C.
solved by universities themselves
D.
donated by private companies or rich people
【单选题】The clavipectoral fascia is penetrated by which artery?
A.
Anterior circumflex humeral artery
B.
Axillary artery
C.
Subscapular artery
D.
Thoracoacromial artery
E.
Thoracodorsal artery
【简答题】overriding commission
【单选题】已知定义在R上的奇函数f（x），满足f（x-4）=-f（x），且在区间上是增函数，则 [ ]
A.
f（15）＜f（0）＜f（-5）
B.
f（0）＜f（15）＜f（-5）
C.
f（-5）＜f（15）＜f（0）
D.
f（-5）＜f（0）＜f（15）
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