执行以下程序段Dim i As Integer, x As nteger x = 0

下列对病毒核酸的错误叙述是

A．可以控制病毒的遗传变异

B．可以决定病毒的感染性

C．RNA可以携带遗传信息

D．每个病毒只有一种类型的核酸

E．决定病毒包膜所有成分的形成

简述影响检全率与检准率的因素。

用户反映电能表跑快，经校验误差为+3%，电能表为2.0级表，应退电量（）。

A、0

B、1%

C、2%

D、3%

信息存储工作的内容主要包括归档、登陆、编目和什么？

I got a job teaching special education at a school in Coachella, California, a desert town about 170 miles from home. It was no (1) job. Street gangs (2) around the school after dark."Be careful," Dad warned me during one of my frequent weekend (3) home. He was concerned about my living (4) , but I needed to be on my own.One evening, I stayed after school to rearrange my classroom. (5) , I turned out the light and closed the door. Then I (6) toward the gate. It was (7) ! I looked around. Everyone had gone home.After (8) all the exits, I found just enough (9) to squeeze under a gate in the back of the school. Then I walked toward my car, parked in a field behind the building.Suddenly I heard voices. I (10) around and saw at least eight boys following me. (11) my pace, I reached into my shoulder bag to get my key. I (12) all over the inside of my handbag. But the key wasn’t (13) ! Dear Lord, please help me, I prayed (14) . Suddenly, my fingers touched a loose key in my purse. I didn’t even know if it was for my car, but I took it out and (15) it. It worked!I opened the door, slid in and locked it—just (16) the teenagers surrounded the car. Trembling , I started the engine and (17) away. When I returned to my apartment, the phone was ringing. It was my Dad. I didn’t tell him about my experience; I didn’t want to (18) him. "Oh, I forgot to tell you!" He said, "I had a(n) (19) car key made and slipped it into your purse—just (20) you ever need it.

第（10）空应选择（）

A．glared

B．glanced

C．walked

D．turned