“生物计算机一旦问世,将是计算机科学领域的一次新的革命”的意思是:
A. 生物计算机的功能超过了数字电子计算机,是一次革命性变化。
B. 生物计算机的出现将改变计算机的理论,是一次革命性变化。
C. 生物计算机一旦研制成功,将在计算机理论和研制上取得突破性进展。
D. 生物计算机一旦研制成功,将是半导体集成电路计算机后计算机的一次飞跃。
听力原文:M: Today, I'm interviewing a young girl named Alex about her feelings on how people can help save the environment. So, Alex, how can we save the environment?
W: By saving water.
M: Well, how can we do that?
W: By not using too much water when we wash dishes, take a bath, and when we do other things, like watering the plants outside.
M: Oh, I think I can do that. What else?
W: When drinking or eating something outside, you should keep the garbage until you find a trashcan to put it in because littering makes our planet dirty. Do you like seeing trash all over the ground?
M: No, I don't. Do you have any final suggestions?
W: Yes. We shouldn't waste paper because trees are being cot down to make the paper. By recycling paper, we save the forests where animals live.
M: So, how can people recycle paper, I mean, everyday?
W: Well, for example, when I was in the office, I used to save the newspapers so that I could collect things made out of them, like paper trees, instead of just throwing them away. Now, the children in our neighborhood collect newspapers once a month to take them to a recycling center.
M: That's great. Well, thanks Alex for your ideas.
(20)
A. Separating different types of garbage.
B. Disposing of trash properly.
C. Having a family clean-up party.
D. Saving water whenever using it.
若按有效受拉混凝土截面面积计算的纵向受拉钢筋配筋率ρte=1.508%,按荷载效应的标准组合计算的纵向受拉钢筋的等效应力σsk=157N/mm2,裂缝间纵向受拉钢筋应变不均匀系数Ψ=0.551,受拉钢筋同上题,则梁表面处的最大裂缝宽度ws,max与下列 ()项数值最为接近。
A. 0.154mm
B. 0.140mm
C. 0.125mm
D. 0.177mm