符合土质路基压实原则的选项有( )。A．先轻后重 B．先高后低 C．先稳后振 D．

在国家大力提倡节能减排和使用新能源的政策支持下，小明家计划安装太阳能电池板供照明使用，同时将普通白炽灯全部换成LED节能灯．他通过调查和查阅资料获取了以下信息：

①小明家所处位置每天平均能接收的太阳能约为1.44×10⁷J/m²．

②某型号的太阳能电池板对太阳能的利用率为10%．

③5W的LED节能灯照明效果与40W的普通白炽灯相同．

④家里有5盏40W的普通白炽灯，每盏灯每天平均使用4h．

请回答下列问题：

（1）请写出一种新能源（除太阳能外），并说说你（家）能为节能减排做些什么？

（2）换用节能灯后与原来相比，每天可节约照明用电多少度？

（3）至少要安装多少平方米该型号的太阳能电池板才够节能灯使用？

青蛙是农业生产的“保护神”，是农民的亲密朋友．青蛙的受精方式是______受精．

下列关于中国古代建筑历史发展情况表述正确的有（）。

A．原始社会晚期，南方出现了干栏式木构架建筑

B．夏朝把版筑技术和排水技术用于城市建造

C．商朝已掌握了较成熟的夯土技术和较大的木构架技术

D．隋朝开凿了贯通南北的大运河

E．五台山南禅寺和佛光寺部分建筑是唐代汉式建筑的典范

晶闸管中频电源可能对电网50Hz的工频电压波形产生影响，必须在电源进线中采取( )措施来减小影响。

A．耦合

B．隔离

C．整流

D．滤波

Traditionally, the woman has held a low position in marriage partnerships. While her husband went his way, she had to wash, stitch and sew. Today the move is to liberate the woman, which may in the end strengthen the marriage union. Perhaps the greatest obstacle to friendship in marriage is the amount a couple usually sees of each other. Friendship in its usual sense is not tested by the strain of daily, year-long cohabitation. (46) Couples need to take up separate interests (and friendship) as well as mutually shared ones, if they are not to get used to the more attractive elements of each other’s personalities.
(47) Married couples are likely to exert themselves for guests--being amusing, discussing with passion and point--and then to fall into dull exhausted silence when the guests have gone. As in all friendship, a husband and wife must try to interest each other, and to spend sufficient time sharing absorbing activities to give-them continuing common interests, (48) But at the same time they must spend enough time on separate interests with separate people to preserve and develop their separate personalities and keep their relationship fresh.
(49) For too many highly intelligent working women, home represents chore obligations, because the husband only tolerates her work and does not participate in household chores. For too many highly intelligent working men, home represents dullness and complaints--from an over-dependent wife who will not gather courage to make their own life.
In such an atmosphere, the partners grow further and further apart, both love and liking disappearing. (50) For too many couples with children, the children are allowed to command all time and attention, allowing the couple no time to develop liking and friendship, as well as love, allotting exclusive parental roles.