考量员工如何执行上级指令的效标属于( )。A．(A) 行为性效标 B．(B) 特征性

我国外流河、内流河丰水期都在夏季，其主要原因是（　　）

A．受气温的影响，夏季全国普遍高温

B．都受夏季风的影响

C．外流区受夏季风的影响，内流区受夏季气温高的影响

D．全国大多数地区降水集中在夏季

我国A公司与一国B公司于2000年2月20日签订了购买5万吨大米的CIF合同。A公司开出信用证规定，装船期限为2000年6月5日至6月15日，由于B公司租用的甲船在开往指定港口时由于战争封锁而迟至6月20日才到达装货港，货物于6月22日装好后启运。承运人在取得B公司开出的保函后签发了与信用证规定一致的提单。

B公司为这批大米投保了淡水雨淋险。2000年6月28日，甲船在途中遭遇飓风，大米部分被浸，在翻晒过程中，大米又被雨淋了。由于船舶的迟延到达，致使目的地大米价格下降，A公司为尽快处理大米而大幅降价，承受了很大的损失。

途中的雨淋属于什么损失，由谁来承担()

A.单独海损承运人承担

B.共同海损各受益人平均分摊

C.共同海损各受益人按比例分摊

D.单独海损A公司承担

后前位胸片摄片时的要求，下列哪项是错误的（）

A.常规胸部后前位，应是深吸气后屏息曝光

B.双肩胛骨应投影于肺野之外

C.照射野越大越好

D.去掉可使胶片产生伪影的物品

E.摄片距离在165～180cm

"It’s no use, Mum," said Johnny. "I’m just no good at dancing."

"You’ve got to keep trying. Tonight will be (1) , dear. Try a turn with that pretty Lisette. "

Johnny (2) . Every Saturday night used to be the best of the week. He and his parents went to the (3) at the Club, where his hero, Alcide, played the accordion with the band. But lately everything had changed. Now that Johnny was older, he was (4) to dance with a girl!

(5) Johnny and his parents arrived at the Club, music had already started. Johnny got up his (6) to approach Lisette. "May I have this dance" Johnny asked. "That’s all right."said Lisette. Johnny struggled to keep up with Lisette’s (7) steps, but he was always one beat behind her. Then Johnny heard his friend Pierre say, "Look! Johnny has two left feet!" (8) burst from the crowd. Johnny (9) and ran outside, determined never to go to another dance.

The next Saturday, Alcide (10) to Johnny’s house for some potatoes. He happened to hear Johnny playing the accordion. Alcide’s eyes (11) . "Bring that accordion and play some songs tonight," Alcide said. Then he drove off, leaving Johnny staring open mouthed (12) him.

At the Club, Johnny scanned the crowd for Lisette and (13) her. The band played for a long time before Alcide said, "Dear friends, I got a (14) for you tonight. Young Johnny is going to join us!" (15) , Johnny stepped up on the platform, his eyes on the floor. He began to play, and the band (16) behind him. When the song ended, he heard cheers. Johnny kept playing until the dance was (17) . "You did a fine job tonight. Play with us again next Saturday night, " Alcide said. "Yes, sir! " said Johnny. (18) he went outside, Johnny saw Lisette and her friends near the door. Lisette stepped (19) , smiling. "You played really good tonight!" she said."Thank you," Johnny blushed. As he walked on, Pierre (20) moved out of the way for him to pass.Johnny patted his accordion. Come to think of it, in his whole life, he had never once seen Alcide out on the dance floor.

4().

A．expected

B．invited

C．allowed

D．chosen

层状云的单极性电荷分布是指：（）

A.云中含有正负极性的荷电粒子；

B.云中只含有一种荷电粒子；

C.云中含有三种以上的荷电粒子