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【单选题】
属于黄嘌呤类药物的是（）A.
氨茶碱
B.
色甘酸钠
C.
特罗
D.
溴化异丙托品
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举一反三
【单选题】根据《建设工程工程量清单计价规范》(GB 50500—2008)，天棚抹灰工程量计算正确的是（ ）。
A.
带梁天棚、梁两侧抹灰面积不计算
B.
板式楼梯底面抹灰按水平投影面积计算
C.
锯齿形楼梯底板抹灰按展开面积计算
D.
间壁墙、附墙柱所占面积应予扣除
【单选题】Which of the following statements is NOT the characteristics of the United States' aircraft launching some satellites?
A.
This method still needs a rocket-powered launch vehicle.
B.
The vehicle can pay no attention to friction with the thick atmosphere.
C.
Much more fuel is needed.
D.
Only smaller satellites can be launched this way.
【单选题】From the 1960s, international terrorist crimes, such as the hijacking of passenger aircraft, political assassinations and kidnappings, and urban bombings, constituted a growing phenomenon of increasin...
A.
some Marxist organizations
B.
millenarian revolutionary movements
C.
nationalist movements of particular religious focus
D.
heads of state and members of governments
【单选题】The 850 British Airways ______flew from Houston to London at its usual time.
A.
fly
B.
aircraft
C.
plane
D.
flight
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