按压发动机指示系统主，次显示上的“BITE”电门自检，在（）有效。 A.N1>10%

如图所示，先后以速度v₁和v₂把一矩形线圈匀速拉出有界的匀强磁场区域，若v₂=2v₁，则在先后两种情况下，下列说法正确的是（　　）

A．线圈中的感应电流之比I₁：I₂=2：1

B．线圈中产生的焦耳热之比Q₁：Q₂=1：4

C．作用在线圈上的外力大小之比F₁：F₂=1：2

D．通过线圈某截面的电荷量之比q₁：q₂=1：2

下列反应中，一定不能自发进行的是（　　）

A．２KClO₃(s)＝2KCl(s) ＋Ｏ₂(g)

ΔＨ＝－78.03 kJ·mol^－1ΔＳ＝1110 J·mol^－1·K^－1

B．CO(g)＝C(s石墨) ＋1/2Ｏ₂(g)　

ΔＨ＝110.05 kJ·mol^－1ΔＳ＝－89.36 J·mol^－1·K ^－1

C．４Fe(OH)₂(s)＋2H₂O(l)＋O₂(g)＝４Fe(OH)₃(s)

ΔＨ＝－444.3 kJ·mol^－1ΔＳ＝－280.3 J·mol^－1·K^－1

D．NH₄HCO₃(s)＋CH₃COOH(aq)＝CO₂(g)＋CH₃COO NH₄(aq)＋H₂O(l)ΔＨ＝37.30 kJ·mol^－1     ΔＳ＝184.05 J·mol^－1·K^－1

如果有一种离子与稀盐酸反应生成白色沉淀，并且此沉淀溶于氨水，则此离子是（）。

A.Pb2+

B.Ca2+

C.Ag+

D.Mg2+

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) ."

分线盒一律装在（）一侧。

A、局分

B、用户

C、任意