问题 问答题 简答题

水样的采集方法有哪些?

答案

参考答案:

1、采集有取样冷却器的水样时,应调节冷却水的取样阀门,使水样流量在500mmL~700mmL/min,温度为30~40℃的范围内,且流速稳定。

2、采集给水、锅炉水样时,原则上应是连续流动之水。

3、盛水样的容器(采样瓶)必须是硬质玻璃或塑料制品(测定微量成分分析的样品必须使用塑料容器)。

4、采集现场监督控制试验的水样,一般应使用固定的采样瓶。

5、测定水中某些不稳定成分(如溶解氧、游离二氧化碳等)时应在现场取样测定,采集方法按各测定方法中的规定进行。

单项选择题

Turkey’s Bodrum peninsula is different. The tourist boom in this part of the world (1) turned some small villages into resorts yet left neighbouring beaches undisturbed, making it quite (2) southern France or the Spanish Coasts where few stretches of coastline are undevelopeD.
The (3) for this happy set of circumstances is simple. For thousands of years, travel here (4) easier by boat than by lanD.So when mass tourism arrived in the (5) 1980s, there was no coast road for ribbon development to follow. So the peninsula, just (6) hour from Bodrum airport, has not become one long littoral of resort.
The building (7) new hotels has mainly been confined to places easily reached by then relatively (8) roads. Such ease of access has made Gumbet, near Bodrum, a busy resort, while the little fishing village of Gumusluk, 12 miles further west and only recently reachable by (9) , remains tranquil and undisturbeD.
It’s worth thinking carefully about location when planning a family (10) on the peninsulA.Choose a place that is centrally located, preferably out of earshot (11) Bodrum town’s "lively"—which means nosy—nightlife, and you can then use (12) area’s comfortably small scale to your advantage. Today’s new roads mean most places can (13) reached in under an hour by taxi or the ubiquitous dolmus-minibus.
The (14) of facilities at the Tamarisk Beach Hotel near the small village of Ortakent makes (15) a good base. The family-run hotel—rooms and suites are in two-storey buildings (16) by palm trees and flowers in terracotta pots—sits above its own sandy (17) beach, shaded by tamarisk trees and sheltered by nearby islands.
The hotel is (18) child-friendly, too. Children, from infants up to young teenagers, can take part in a (19) of games and activities that include tuition in windsurfing, dinghy (20) catamaran sailing.

Why does the groundwater from the north finds its way into the canyon, but the water from the south doesn’t

A.Because there are fractures in the rocks in the south.

B.Because the southwest part of the underlying rock beds are a bit lower than those in the opposite direction.

C.Because the pressure of the upper streams forces the water to flow in from the north and flow away from the south.

D.The reason is not mentioned in the passage.

单项选择题