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【单选题】
如图为血液循环过程中血液内某物质含量的变化，下列分析不正确的是（ ）A.
若B为肺泡外毛细血管，D为组织细胞间毛细血管，则该物质一定是氧气
B.
若B为肾小球毛细血管，D为肾小管外毛细血管，则该物质可能是蛋白质
C.
若B为小肠绒毛内毛细血管，则该物质一定是营养物质
D.
无论该物质为物质，B和D都一定是毛细血管
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【单选题】点M沿图示曲线AOB运动，曲线由AO、OB两圆弧组成，AO段圆弧的半径R1 = 18m，OB段圆弧的半径R2 = 24m，取两圆弧交接处O为弧坐标的原点，其正负方向规定如图。已知点的运动方程为 【图片】 ，式中s以米计，t以秒计。则点从运动开始算起的5秒内走过的路程为（）。（提示，要先求出速度，算出质点开始反向运动的时刻。分段计算路程）【图片】
A.
2m
B.
16m
C.
13m
D.
9m
【简答题】已知质点沿x 轴作直线运动,其运动方程为【图片】,式中x 的单位为m,t 的单位为 s．求：质点在该时间内所通过的路程为（填数字） m；
【单选题】What might happen to the drivers who illegal substances?
A.
They will be sent to a laboratory.
B.
They will lose their licences.
C.
They will be fined and could lose their licences.
D.
They will be sentenced guilty.
【单选题】What might happen to them if they crossed the bridge?
A.
They might arrive at home earlier.
B.
They might fall into the river and die.
C.
Nothing would happen.
【简答题】已知质点沿x 轴作直线运动,其运动方程为【图片】,式中x 的单位为m,t 的单位为 s．求：t＝4 s时质点的速度大小为（填数字） m/s
【简答题】已知质点沿x 轴作直线运动,其运动方程为【图片】,式中x 的单位为m,t 的单位为 s．求：质点在运动开始后4.0 s内的位移的大小为（填数字）m；
【单选题】What might happen to the two codes in the future?
A.
Nothing will happen to them.
B.
There might be another code break off from the two.
C.
They might reunite together.
D.
They might change the rules and scoring system from women's teams.
【单选题】What did the doctor think might happen to Ellen?
A.
She might put on more weight.
B.
She might stop eating too much.
C.
She might have a heart attack.
D.
She might go to another doctor.
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