用离子交换树脂法提取总生物碱，所选择的树脂类型应是A．大孔树脂 B．弱酸型树脂 C．

This is a ________ film and everyone feels ________ .

A．boring; boring

B．bored; bored

C．bored; boring

D．boring; bored

以下哪项与猫眼疮病因无关：（）

A.药物过敏

B.食物过敏

C.体内病灶感染

D.维生素缺乏

E.禀赋不耐

患者女性，13岁。自幼发育差。突发头痛、呕吐1周，查体：体温39℃，神清，颈强直，右侧肢体肌力4级，肌张力高，心前区可闻杂音。初步考虑诊断为

A．脑膜炎
B．偏头痛
C．脑肿瘤
D．脑脓肿
E．脑出血

淫羊藿、巴戟天共同的功效是（）

A.补肾益精，养血益气

B.补肾壮阳，祛风除湿

C.温肾壮阳，祛寒除湿

D.补肾助阳，润肠通便

E.补肾益肺，止血化痰

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（20）空应选择（）

A．even if

B．on condition that

C．in case

D．in time