【单选题】听力原文:M: Hi, Laura. Where are you heading? W: Hi, Peter. Put off to the gym. I've got to stay in shape, you know. M: What's the main reason you work out? For your health, or to look good? W: To be hone...
A.
He is an active sportsman.
C.
He enjoys playing baseball.
D.
He exercises regularly.
【判断题】模拟调制系统的基带信号是模拟信号,载波是连续的正弦波。( )
【单选题】听力原文:W: Hi, Mark! How is it going? M: Well, not so great. W: What's wrong? M: I've got a big problem with the poetry course that's required for my major. W: Is that all filled up? M: No, no, there is ...
A.
It's only open to poetry majors,
B.
It requires another class first.
D.
It's only offered in the morning.
【判断题】刚体受同一平面内三个互不平行的力作用而平衡时,此三个力的作用线必汇交于一点。
【判断题】模拟调制系统的基带信号是模拟信号,载波是连续的正弦波。( )
【多选题】模式识别受体识别保守的模式(不同类别侵略者的特征)。模式识别受体中的Toll样受体家族(TLRs)中。
A.
Toll样受体4(TLR4)检测革兰氏阴性菌细胞外膜脂多糖LPS的存在。TLR4也能检测某些病毒所制造的蛋白质。
B.
TLR2专门识别革兰氏阴性菌“标签”蛋白质。
C.
TLR3识别许多病毒感染中产生的双链RNA。
D.
TLR9识别细菌DNA特有的非甲基化DNA二核苷酸CpG。
【单选题】Speaker A: Hi John, I've got a very good job offer. Speaker B: __________
C.
Are you trying to impress me?
D.
You care too much about it.
【单选题】—Hi, Mike, I’ve got a present __________ you. —Oh, it’s really beautiful. Thank you very much.