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【简答题】
被称为“中国导弹之父、中国火箭之父、火箭之”的科学家是谁?
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【简答题】在Word2010,显示在每页顶端的相同的内容可以插入( )来完成。
【单选题】Given the following data, calculate the creatinine clearance Serum creatinine = 1.5 mg/dL; urine creatinine = 102 mg/dL; urine volume = 1.8 mL/min; body surface area = 1.73 m2
A.
147 mL/min
B.
100 mL/min
C.
122 mL/min
D.
116 mL/min
【单选题】根据IMO的港口国监督程序,PSC检査官的检查程序是:I观察船舶的维护状况,产生概括性的认识并登轮检査船舶证书和文件II如果船舶不具备有效证书或文件,或存在明显理由,应进行详细检查III船舶存在的缺陷危及船舶安全和海洋环境时,可采取的行动包摘滞留船舶IV检査完毕向船长签发PSC检査报吿
A.
I~IV
B.
II~IV
C.
I~III
D.
I、II、IV
【单选题】能将三角波变成频率相同的矩形波的电路是( )。
A.
单稳态触发器
B.
施密特触发器
C.
多谐振荡器
D.
二进制计数器
【判断题】虎丘塔是苏州现存最古之塔,成为苏州城的象征。
A.
正确
B.
错误
【简答题】是苏州现存最古之塔,成为苏州城的象征。
【判断题】温室花卉原产热带、亚热带及南方温暖地区的花卉,在北方寒冷地区栽培,必须全年在温室内培养。
A.
正确
B.
错误
【单选题】The clearance volume for a single stage compressor is defined as the space created between the ().
A.
top of the piston and bottom side of head, with the piston at BDC
B.
piston and head, including the space around the piston to the top of the upper ring and under the valves, with the piston at TDC
C.
bottom of the piston and bottom side of the head at TDC, regardless of upper ring location and valve placement
D.
top of the piston and bottom side of the head at TDC as compared to that which exists between the top of the piston and bottom side of head at BDC
【单选题】一个同步时序逻辑电路可用( )三组函数表达式描述
A.
最小项之和、最大项之积和最简与或式
B.
逻辑图、真值表和逻辑式
C.
输出方程、驱动方程和状态方程
D.
输出方程、特性方程和状态方程
【单选题】Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished _____.
A.
during the valve overlap period
B.
with only the exhaust valve open
C.
at a pressure below atmospheric
D.
without cooling the cylinders or pistons
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