球门线距罚球点球点的距离是11米。

先天性马蹄内翻足的病变在（）

A.跟骨

B.足舟骨

C.距骨

D.楔骨

E.骰骨

Nearly five years before, and with the help by our father, my sister and I planted

Some cherry tomatoes(圣女果)in our back garden. Since then for all these year we had been allowing tomatoes to self-seed where they please. As result, the plants are growing somewhere. The fruits are small in size, but juicy and taste. There are so much that we often share them with our neighbors. Although we allow tomato plants to grow in the same place year after year, but we have never had any disease or insect attack problems. We are growing wonderfully tomatoes at no cost!

马钱子的中毒症状主要表现是（）

A.消化系统

B.心血管系统

C.泌尿系统

D.中枢神经系统

E.呼吸系统

随机事件的概率P的取值范围是（）

A.P≤1

B.P≥0

C.0

D.0≤P≤1

E.-1≤P≤1

对观察的内容、程序事先不做严格规定，依现场的实际情况随机决定的观察是（）。

A.自然观察

B.间接观察

C.无结构式观察

D.随机观察