＜head＞ 和＜／head＞标记表示的是文档头部信息，一般包括标题和主题信息，该部分信息不会显示在页面正文中（）

A.＜p＞＜/p＞

B.＜br＞

C.＜font＞＜/font＞

D.＜head＞＜/head＞

3.已建立学生“英语”课程的成绩链表（成绩存于score域中,学号存于num域中）, 下列函数用于输出待补考学生的学号和成绩,及补考学生人数。 void require(struct student *head) { struct student *p; ① if(head!=NULL) { ② while(p!=NULL) { if(③ ) { printf(”%7d %6.1f\n”,p-＞num,p-＞score); n++; } p=p-＞next; } printf(”%ld\n”, n); } }

A.HEADER

B.HEADERS

C.HEAD

D.BODY

A.15000

B.20000

C.25000

D.30000

Today we live in a world where GPS systems, digital maps, and other navigation apps are available on our smart phones. 1 of us just walk straight into the woods without a phone. But phones 2 on batteries, and batteries can die faster than we realize. 3 you get lost without a phone or a compass, and you 4 can’t find north, a few tricks to help you navigate 5 to civilization, one of which is to follow the land... When you find yourself well 6 a trail, but not in a completely 7 area, you have to answer two questions: Which 8 is downhill, in this particular area？ And where is the nearest water source？ Humans overwhelmingly live in valleys, and on supplies of fresh water. 9 , if you head downhill, and follow any H2O you find, you should 10 see signs of people. If you’ve explored the area before, keep an eye out for familiar sights—you may be 11 how quickly identifying a distinctive rock or tree can restore your bearings. Another 12 : Climb high and look for signs of human habitation. 13 , even in dense forest, you should be able to 14 gaps in the tree line due to roads, train tracks, and other paths people carve 15 the woods. Head toward these 16 to find a way out. At night, scan the horizon for 17 light sources, such as fires and streetlights, then walk toward the glow of light pollution. 18 , assuming you’re lost in an area humans tend to frequent, look for the 19 we leave on the landscape. Trail blazes, tire tracks, and other features can 20 you to civilization. 1.

A、Some

B、Most

C、Few

D、All

国家计量局对于“量出式”吸量管的标记

A．用“E”是表示

B．用“A”是表示

C．用“TC”是表示

D．用“TD”是表示

E．用“TT”是表示

国家计量局对于“量出式”容量仪器的标记

A．用“E”是表示

B．用“A”是表示

C．用“TC”是表示

D．用“TD”是表示

E．用“TT”是表示

辣根过氧化物酶的RZ表示

A．酶活性

B．催化效率

C．标记率

D．酶纯度

E．效价

国家计量局对于“量入式”吸量管的标记

A．用“E”是表示

B．用“A”是表示

C．用“TC”是表示

D．用“TD”是表示

E．用“TT”是表示

在放射免疫分析检测中，B/B+F表示

A．结合态的标记抗原与总的标记抗原之比

B．结合态的标记抗原与游离的标记抗原之比

C．总标记抗原与抗原抗体复合物之比

D．结合态的抗原与总的抗体之比

E．结合态的抗原与总的抗原之比