与B7结合抑制T细胞活化的是
A、CD2
B、CD40L
C、ICOS
D、CTIA-4
E、CD28
一名妇女，月经周期为32天，则其排卵大概在月经周期的
A、第14天
B、第15天
C、第16天
D、第17天
E、第18天
Which of the following can best serve as the title of the passage？
A．A Possible Approach to Checking Heart Disease
B．The Risk of Heart Disease
C．The Relation Between Weight and Blood Pressure
D．How to Improve Your Heart Health
It can be inferred from Paragraph 4 that______.
A．golf and photography skills don"t fit children
B．there must be a tournament for the skill you teach
C．getting ready to share is the basis of helping children
D．traditional sports are neglected by the children now
大量咯血指的是
A、每日咯血量100ml
B、每日咯血量200ml
C、每日咯血量300ml
D、每日咯血量在500ml以上
E、一次咯血量100ml
Whats the authors attitude towards eating fruit in the last paragraph？
A．People shouldn"t eat fruit.
B．People should eat less fruit.
C．People may eat more fruit.
D．People should eat fruit in moderation.