呆账贷款认定的依据是什么

下列关于投资者风险承受能力的说法，不正确的是( )。

A．不同人的风险承受能力不同

B．退休老人的风险承受能力通常低于中年人

C．投资期限越长，风险承受能力越强

D．长期财务目标弹性越大，风险承受能力越弱

下列句子中的标点符号使用正确的一项是

A．我们往往会遇到这样的情况：只从一个方向考虑问题：路子越走越窄。换个角度想一想，或许会得到意想不到的收获。

B．“我们会善待这些藏品，”博物馆馆长说，“请大家全力以赴，做长久的打算。”

C．“人非圣贤，孰能无过”？问题在于，有了“过”，是任其自由发展，还是从“过”中吸取教训，变“过”为前进的动力。

D．今天，无偿献血成为杭城一道亮丽的风景。在武林门献血点，3名三、四十岁的公安干警分别献出200毫升鲜血。

系统性能要求不包括（）

A.可靠性

B.正确性

C.可读性

D.安全性

Yellowstone Weather
Yellowstone National Park is at high altitude. Most of the park is above 7,500 feet (2,275 meters).
Yellowstone’s weather is unpredictable. In summer, it may be warm and sunny with temperatures in the high 70F. At night in any given month, the temperature may drop close to freezing. So it is best to come prepared for cold evenings and mornings, especially if you are camping or hiking. When you leave your campsite, please leave it prepared for possible thundershowers and wind.
A sunny warm day may become fiercely stormy with wind, rain, sleet and sometimes snow. Without enough clothing, an easy hike or boat trip can turn into a battle for survival.
Seasonal Weather Information
Spring
Cold and snow continue into May, although temperatures gradually climb Early in spring, daytime temperatures average in the 40F to 50F; by late May and June, they may reach the 60F and 70F. Nighttime lows fall below freezing.
Summer
Daytime temperatures are usually in the 70F, occasionally reaching the 80F in the lower elevations (高度). Nights are cool, temperatures may drop in the 40F and 30F—sometimes even the 20F. June can be cool and rainy; July and August tend to be somewhat drier, although afternoon thundershowers are common.
Fall
Weather can be pleasant, although temperatures average 10-20 degrees lower than summer readings. Nighttime lows can fall into the teens and lower. Snowstorms increase in frequency as the weeks go by or towards the end of the fall season.
Winter
Temperatures often stay near zero throughout the day, occasionally reaching high in the 20F. Subzero nighttime lows are common. Annual snowfall averages nearly 150 inches in most of the park. At higher places, 200 -400 inches of snow have been recorded.

The author writes this passage most probably for those who plan to ______ in Yellowstone National Park.

A．do research work

B．take a business trip

C．have sports games

D．spend their holidays or take a tour

若一个微带2功分器的插损指标为0.3dB，在使用中，若输入信号大小为20dBm，则2个输出口的信号大小为（）。

A.16.7，19.7

B.16.4，16.4

C.16.7，16.7

D.19.7，19.7