下面关于DCSU板拨码开关说明，错误的是（）。

A、SW2～SW5不论是主组还是从组中，主机柜都是OFF。副机柜都是ON

B、DCSU单板共有14个拨码开关，SW12～SW14预留

C、SW1、SW11用于并组中主组、从组中主机柜的设置和终端匹配选择

D、SW2～SW5用于并柜时主机柜、副机柜设置及终端匹配选择

A society’s infant mortality rate is an accepted indicator of that society’s general health status. Even though in some localities in the United States the rate is higher than in many developing countries, in the United States overall the rate has been steadily declining. This decline does not necessarily indicate, however, that babies in the United States are now, on the average, healthier at birth than they were in the past. Which one of the following reasons, if true, most ply supports the claim made above about the implications of the decline

A．The figure for infant mortality is compiled as an overall rate and thus masks deficiencies in particular localities.

B．Low birth weight is a contributing factor in more than half of the infant deaths in the United States.

C．The United States has been developing and has achieved extremely sophisticated technology for saving premature and low-birth-weight babies, most of whom require extended hospital stays.

D．In eleven states of the United States, the infant mortality rate declined last year.

E．(E) Babies who do not receive adequate attention from a caregiver fail to thrive and so they gain weight slowly.