《天然气》(GB17820)的气质标准规定在天然气交接点的压力和温度条件下，天然气的

某上市公司董事涉嫌内幕交易，由于案情复杂，国务院证券监督管理机构在调查过程中，经其主要负责人批准，决定限制该董事的证券买卖30个交易日，该限制证券买卖的做法符合法律规定。()

作用阀根据（）IAJ空气压力的变化，控制机车制动缸的充气或排气。

A．作用管

B．作用风缸

C．作用风缸或作用管

阅读理解。

     On December 18, 1620, passengers on the British ship Mayflower came on shore at modern-day

Plymouth, Massachusetts, to begin their new settlement, Plymouth Colony.

     The famous Mayflower story began in 1606, when a group of reform-minded people in England built

their own church, which was separate from the state-supported Church of England. Because of this, they

were forced to leave the country and settle in Netherlands. After 12 years of struggling to adapt and make

a hard living, the group sought financial backing from some London merchants to set up a colony in America.

     On September 6, 1620, one hundred and two passengers-called Pilgrims (朝圣者) by William Bradford,

a passenger who would become the first governor of Plymouth Colony-crowded on the Mayflower to begin

the long, hard journey to a new life in the New World. On November 11, 1620, the Mayflower landed at

Provincetown Harbor. Before going on shore, 41 male passengers-heads of families, single men and three

male servants-signed the famous Mayflower contract, agreeing to form a government chosen by common

election and to obey all laws made for the good of the colony.

     Over the next month, several small leading teams were sent on shore to collect firewood and hunt for a

good place to build a settlement. Around December 10, one of these groups found a harbor they liked on the

western side of Cape Cod Bay. They returned to the Mayflower to tell the other passengers, but bad weather

prevented them reaching the harbor until December 16. Two days later, the first group of Pilgrims went on

shore. After exploring the region, the settlers chose a cleared area once controlled by members of a local

Native American tribe (部落). The tribe had abandoned the village several years earlier, after an outbreak of

European disease.

     That winter of 1620-1621 was really hard, as the Pilgrims struggled to build their settlement, find food and

take care of the sick By spring, 50 of the original 102 Mayflower passengers were dead. The remaining settlers

made contact with returning members of the Native American tribe and in March they signed a peace treaty (条

约) with the tribe chief. In the spring time, helped by the locals, the Pilgrims were able to plant crops-especially

corn and beans-that were necessary to their survival.

     On April 5, 1621, the Mayflower and its crew left Plymouth to return to England. Over the next several

decades, more and more settlers made the voyage across the Atlantic to Plymouth, which gradually grew into

a successful shipbuilding and fishing center.

1. A group of English were forced to leave their country in 1606 because _____.[ ]

A.their belief was different from the official Church

B. they built their own churches in a foreign country

C. they lacked financial support from the government

D. they were ambitious to build the colony in America

2. How many days did the sea journey to Provincetown Harbor last? [ ]

A. 103

B. 96

C. 66

D. 35

3. Several leading teams were sent in order to _____. [ ]

A. hunt for food for the passengers

B. control local Native Americans

C. build a settlement for the passengers

D. explore the region for their settlement

4. From the passage we know that _____ between 1620-1621.[ ]

A. 52 Mayflower passengers died of some illnesses

B. Pilgrims had a good relationship with the locals

C. Plymouth turned a main center for shipbuilding

D. Pilgrims tried to plant corns and beans in winter

Internet中用于电子邮件管理的协议是______。

家畜肉的品质好坏，主要是以肉的（）来确定。

A、新鲜度

B、软硬度

C、纯度

D、肥瘦度