焊接钢筋网及骨架允许偏差为（）（mm）A、±10B、±12C、±15D、±20

一个可供使用的万用表，S为选择开关、Q为欧姆档调零旋钮．现在要用它测量两个电阻的阻值，R₁大约几十欧姆、R₂大约几百欧姆．下面提出了在测量过程中一系列可能的操作．请选出尽可能准确地确定各阻值同时又符合万用表安全使用规则的各项操作，并且将它们按合理顺序填写在后面的横线空白处

（A） 将两表笔短接，调节Q使表针对准欧姆档刻度盘上的零欧姆处、随后即断开；

（B） 旋动S使其尖端对准欧姆档×100；

（C） 旋动S使其尖端对准欧姆档×10；

（D） 旋动S使其尖端对准欧姆档×1；

（E） 旋动S使其尖端对准交流电压的最高档；

（F）将两表笔分别接到R₁的两端、读出R₁的阻值、随后即分开；

（G） 将两表笔断开，使指针指电流为零的位置；

（H） 旋动S使其尖端对准欧姆档×1K；

（I） 将两表笔分别接到R₂的两端、读出R₂的阻值、随后即断开；

正确地操作顺序为______．

（）预警法侧重定量分析。

A.黑色

B.红色

C.黄色

D.蓝色

3A的直流电通过电阻R时，t时间内产生的热量为Q；现让一交流电通过电阻R，若2t时间内产生的热量为Q，则该交流电流的有效值和最大值分别为（　　） A．I有=3/2A，Im=3A B．I有=3A，I有=3A C．I有= A，I有 A D．I有3A，Im=6A

Part 4

Questions 26-45

·Read the following text and decide which answer best fits each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.

Speaking Her Hind

By the time they turn 55, most Hollywood actresses see their careers start to fade. Not (26) for Susan Sarandon, who will help kick offthe fall movie season with three films.
(27) of the movies are likely to be blockbusters, but Sarandon chooses her (28) more for the stories they tell (29) for their commercial potential. "If we’re very lucky, these films will (30) questions that people will talk about," she says.
She’s done her own share of questioning, and arrived at a place in life (31) she’s not afraid to stand (32) her convictions—and then follow (33) with action. The eldest of nine children in a New Jersey Roman Catholic family, she stumbled into an acting (34) when she attended an audition with her ex-husband, Chris Sarandon. Twenty-five years and five Oscar nominations later, she (35) a Best Actress Academy Award for her role as Sister Helen Prejean in 1995’s Dead Man Waling, a searing film about capital punishment.
By (36) Sarandon was practiced at using her celebrity to (37) causes close to her heart. (38) , while presenting an award at the 1993 Oscars, she and longtime partner Tim Robbins, an actor and director, took 30 seconds of their podium time to speak on (39) of Haitian refugees with AIDS. "At the (40) of acting and activism is imagination," Sarandon says. "I’ve (41) had the ability to imagine being in someone else’s shoes."
She is a supporter of end-hunger and poverty (42) including Heifer International, Madre, and Habitat for Humanity, as (43) as the Center for Constitutional Rights. In the aftermath of September 11, she cooked for workers at Ground Zero, did benefit performances, and befriended firefighters and victims’ families.
Sarandon is (44) hands-on in the role she calls her (45) important—mother of three children.

A．well

B．soon

C．far

D．just

发电机正常运行时，定子电流三相不平衡值一般不能超过定子额定值的（）。