下面程序段的运行结果是( ) whi1e (a 1，2，0

Whiδξφλσδφφch<br/>of theδξφσλδξφσvity?() A: priσδξφλσδφe B: Dδξ<br/>φλασδrase α C: RNδξφσλδφA<br/>pose II D: reverξφδσξφiptase E: teδξφκλσδδξφse

The tackle that raises and lowers the boom is（）. A: the cargo fall B: The cargo hoisting wire rope C: the topping lift D: the cargo whi

To know where you are going， you are advised to ____ . A: ask the police for detailed information B: look at the map before leaving the hotel C: always travel with your business partner D: have a smart phone with you whi1e traveling

A major recognizable difference between clients with anorexia nervosa and clients with bulimia nervosa is that clients with anorexia usually() A: Tend to be more extroverted than clients with bulimia nervosa B: Seek intimate relationships whi]e clients with bulimia avoid them C: Deny the problem while clients with bulimia generally recognize that their eating pattern is abnormal D: Act at greater risk for physical problems such as fluid and electro

C语言中whi1e和do-while循环的主要区别是()。 A: do-while的循环体至少无条件执行一次 B: while的循环控制条件比do-while的循环控制条件严格 C: do-while必须从外部转到循环体内

【单选题】如图, AB 两点间电压 U AB =______ 。 A . E 1 - E 2 - IR B . E 2 - E 1 - IR C . E 2 - E 1 + IR D . E 1 - E 2 + IR A. E 1 - E 2 - IR B. E 2 - E 1 - IR C. E 2 - E 1 + IR D. E 1 - E 2 + IR

已知\( y = {e^{2x + 1}} \)，则\( y' \)为（ ）. A: \( 2{e^{2x + 1}} \) B: \( {e^{2x + 1}} \) C: \( {e^x} \) D: \( (2x + 1){e^{2x + 1}} \)

已知\( y = {e^{2x + 1}} \)，则\( y'' \)为（ ）. A: \( 2{e^{2x + 1}} \) B: \( 4{e^{2x + 1}} \) C: \( {e^{2x + 1}} \) D: \( 8{e^{2x + 1}} \)

高分子溶解在良溶剂中，则（ ）。 A: χ1＞1/2, Δμ1 E＞0 B: χ1＞1/2, Δμ1 E＜0 C: χ1＜1/2, Δμ1E＞0， D: χ1＜1/2, Δμ1 E＜0