存在一个等待事务集T0, T1, …, Tn，其中T0正等待被T1锁住的数据项，T1

关于裸子植物的下列叙述中，错误的是（  ）

A有根、茎、叶的分化

B.开花后，形成果实

C.种子裸露，无果皮包被

D.松、柏、银杏等都是裸子植物

儿茶酚胺合成过程中的限速酶是()

A．酪氨酸羟化酶

B．氨基转移酶

C．单胺氧化酶

D．多巴胺-β-羟化酶

E．丁酰胺酶

下列现象中，不属于生物对环境的适应的是

A．北极熊白色的体毛

B．鱼的体型为梭型

C．牦牛的绒很保暖

D．孔雀开屏

有人说，“定高的目标，然后才能发挥自己的水平，才能做出更大的贡献”，你怎么看

Despite (1) that alcoholic beverages may (2) , a leading medical expert is advising: don’t (3) just yet.
Anybody who’s ever worked in a hospital sees the hospital is full of patients that have (4) disease, but the hospital is not full of patients that have disease related to cholesterol and (5) .
In an (6) in the current New England Journal of Medicine, Dr. Goldberg of Columbia University said it is time to see (7) prevents heart disease. Such a study would give (8) to one group of heart disease patients and not to another, and see (9) .
In the latest study, which followed (10) over a 12-year period, researchers found that those who drank (11) drinks per week (12) of heart attack by (13) compared to (14) .
The lead author, (15) Kenneth Mukamal of Beth Israel Deaconess Medical Center in Boston, insists his study is (16) . For one thing, other studies have not looked at (17) .
Dr. Mukamal says (18) also appear to settle which alcoholic beverage are (19) . "Beer and spirits, beer and liquor, were most ply (20) ."