— What's up? You look _____ right now.
— I'm afraid to take the exam. I'll let my mother _____ if I can't pass it.
A：pale; in
B：pale; down
C：excited; in
D：excited; down
将人血涂片放在显微镜低倍镜下观察，可看到有细胞核的血细胞是（ ）
若a→=（1，λ，2），b→=（2，﹣1，1），a→与b→的夹角为60°，则λ的值为（ ）
Mary, Jane and May are very good friends. Mary is shorter than May, May is heavier than Jane. Jane is thinner than Mary. How old are they? Mary is 7 years old. Jane is 12 years old and May is 9 years old. They study at Qinglan Primary School. Mary likes English, Jane likes math and May likes music. They all study hard.
